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ASUS ROG STRIX B850-A GAMING WIFI vs MSI MAG X870E TOMAHAWK WIFI

A

Product A: ASUS

ROG STRIX B850-A GAMING WIFI

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B

Product B: MSI

MAG X870E TOMAHAWK WIFI

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Only differences

AASUS ROG STRIX B850-A GAMING WIFI

BMSI MAG X870E TOMAHAWK WIFI

General

2 of 9 differ

Series

ROG Strix2Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026ROG Strix is the ASUS line in the product name. The page sits in the ROG Strix motherboard family.

MAG1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Cover: MAG Series Motherboard, MAG X870E TOMAHAWK WIFI.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

ROG STRIX B850-A GAMING WIFI, 90MB1J50-M0AAY0, 90MB1J50-M0EAY01Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026The page's order configuration id is 90MB1J50-M0AAY0. Paradigit lists 90MB1J50-M0EAY0 for the same board.11Retailer pageparadigit.ie/asus-rog-strix-b850-a-gaming-wifi/21754542/productRead 14 October 2026Paradigit lists product number manufacturer 90MB1J50-M0EAY0 for the board.

MAG X870E TOMAHAWK WIFI, 911-7E59-006, 911-7E59-017, 601-7E59-04S2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026MSI German store order code 911-7E59-006 (SKU in the store feed) for MSI MOTHERBOARD MAG X870E TOMAHAWK WIFI.3Maker product pageuk-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026MSI UK store order code 601-7E59-04S in the store feed.4Maker product pagees-store.msi.com/products/mag-x870e-tomahawk-wifi-placas-baseRead 15 October 2026MSI Spanish store order code 911-7E59-017.

GTIN / EAN

197105772670, 47113877726768Retailer pageamazon.com/dp/B0DPLP33YRRead 14 October 2026The Amazon US listing for ASIN B0DPLP33YR gives UPC 197105772670 and Mfr Part Number ROG STRIX B850-A GAMING WIFI.9Retailer pagescan.co.uk/products/asus-rog-strix-b850-a-gaming-wifiRead 14 October 2026Scan UK lists GTIN 4711387772676.10Spec databasebuildcores.com/products/Motherboard/xy81tonxw/ASUS-ROG-STRIX-B850-A-GAMING-WIFIRead 14 October 2026BuildCores lists UPC 197105772670 and 197105983472 and EAN 4711387772676. 197105983472 is not stored, since no page ties it to this model.

4711377291927, 8241423956602Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Barcode 4711377291927 in the store's product feed.3Maker product pageuk-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Barcode 4711377291927.4Maker product pagees-store.msi.com/products/mag-x870e-tomahawk-wifi-placas-baseRead 15 October 2026Barcode 4711377291927 in the store's product feed.10Retailer pageamazon.com/dp/B0DT55ZJM7Read 15 October 2026Item details list UPC 824142395660 for the MAG X870E Tomahawk WiFi (ASIN B0DT55ZJM7).

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

6 January 20254Press releasepress.asus.com/news/press-releases/asus-amd-x870e-b850-b840-rog-strix-tuf-prime-motherboardsRead 14 October 2026ASUS press release of 2025-01-06 introduces the ROG Strix B850-A Gaming WiFi.

Not available

Status

Available8Retailer pageamazon.com/dp/B0DPLP33YRRead 14 October 2026The listing is in stock on 2026-10-14 at best sellers rank 3 in Computer Motherboards.10Spec databasebuildcores.com/products/Motherboard/xy81tonxw/ASUS-ROG-STRIX-B850-A-GAMING-WIFIRead 14 October 2026BuildCores shows US retailers in stock on 2026-10-14 (Amazon, Best Buy, Newegg, Walmart).

Available2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026The product is listed for sale at 329 EUR on 2026-10-15.10Retailer pageamazon.com/dp/B0DT55ZJM7Read 15 October 2026Listed and in stock at 267.99 USD on 2026-10-15, best sellers rank 6 in Computer Motherboards.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

MSI MAG X870E TOMAHAWK MAX WIFI12Reviewclub386.com/msi-mag-x870e-tomahawk-max-wifi-reviewRead 15 October 2026Review of the MAG X870E Tomahawk MAX WIFI, dated 2026-01-14: the Max board has the same baseline specifications as the original X870E Tomahawk and replaces it on store shelves. Its BIOS flash is doubled to 64MB, so the 256 Mb flash here is the older chip. The older board is still on sale at retailers on 2026-10-15.

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

Not available

Not available

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

Not available

ColoursiThe maker's own colour names

Not available

Not available

SegmentiThe maker's own product category, e.g. ASUS ProArt is Creator. It is not assigned from price or features. Maker lines that are not gaming, creator or workstation lines, such as ASUS PRIME, MSI PRO and ASRock Pro, are mainstream.

Gaming2Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026The page sits under ROG gaming motherboards (breadcrumb Gaming Motherboards).

Gaming7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026The review calls MAG (MSI Arsenal Gaming) MSI's entry-level lineup and the Tomahawk its main arsenal. Tom's Hardware names the Tomahawk and Arsenal Gaming branding on the board.

Board revisioniThe maker's revision name, e.g. rev. 1.1, for variant rows of revisions that keep the board's name and model number. Leave it out when the maker names no revision.

Not available

Not available

Platform

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CPU socketiSocket name without spaces, e.g. AM5 or LGA1851.

AM51Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026

AM51Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, CPU: processor socket AM5.

ChipsetiChipset with its brand and without the word chipset, e.g. AMD B850, AMD X870E or Intel Z890. Same form as desktop PCs and as compatible chipsets on CPUs.

AMD B8501Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026

AMD X870E1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: AMD X870E Chipset.

Supported processorsiProcessor series the maker lists for the board, one item per series in the chip maker's name. BIOS updates can add series later.

AMD Ryzen 9000 Series, AMD Ryzen 8000 Series, AMD Ryzen 7000 Series1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026AM5 for Ryzen 9000, 8000 and 7000 Series. The page refers to the ASUS download center for the CPU support list. Read on 2026-10-14.

AMD Ryzen 9000 Series, AMD Ryzen 8000 Series, AMD Ryzen 7000 Series1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, CPU: AMD Ryzen 9000, 8000 and 7000 Series Desktop Processors. The manual says to check msi.com for the newest support status. Read on 2026-10-15. BIOS updates can add series later.

CPU overclockingiThe board allows multiplier overclocking of an unlocked CPU. Memory overclocking alone does not count.

Yes7Maker product pageamd.com/en/products/processors/chipsets/am5.htmlRead 14 October 2026AMD describes the B850 platform with enhanced overclocking capabilities, and its chipset table lists CPU overclocking as Yes for B850. This is the chip maker's page and not the board maker's. ASUS also describes PBO enhancement and overclocking headroom for this board.

Yes11Press articleguru3d.com/review/colorful-igame-x870e-vulcan-w-oc-v14-review/page-2Read 15 October 2026AMD X870E Chipset Overview table: CPU overclocking Yes, memory overclocking Yes. This is the chipset maker's feature, shown in a review of another X870E board.

Board

1 of 5 differ

Form factoriThe maker's stated board standard. Other covers sizes such as XL-ATX or Mini-DTX.

ATX1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026ATX form factor.

ATX1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: ATX Form Factor, 9.6 in. x 12 in. (244 mm x 305 mm).

Board dimensionsiSize of the board itself. Height runs along the rear I/O edge, as the board stands in a tower case. ATX is 244 mm wide and 305 mm high. Micro ATX is 244 mm high and up to 244 mm wide. A size with a cover that reaches past the board, as NZXT prints, is not used when the maker also states the board size.

Width244Height305mm(9.6 × 12 in)1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 202612 inch x 9.6 inch (30.5 cm x 24.4 cm).

Width244Height305mm(9.6 × 12 in)2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026PCB Info: ATX 243.84mm x 304.8mm. The manual prints 9.6 in. x 12 in. (244 mm x 305 mm), and that rounded figure is stored.

PCB layersiCopper layers in the circuit board as published.

82Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026Overview page: eight-layer PCB. The page also describes a white PCB.

82Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Key features, German text: 8 Schichten Server Niveau PCB mit 2 oz verdicktem Kupfer (8-layer server-grade PCB with 2 oz thickened copper). The English UK page says 8-layer PCB made by 2oz thickened copper.3Maker product pageuk-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Key features: 8-layer PCB made by 2oz thickened copper and server-grade level material.5Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026Page 1: a black 8-layer server-grade PCB.7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 20268-layer PCB (NPG-170D) with 2oz thickened copper.

Back-connect designiPower, fan and front-panel connectors sit on the back of the board to hide the cables, e.g. ASUS BTF, MSI Project Zero or GIGABYTE Stealth. It needs a case made for it.

No3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdfRead 14 October 2026The layout in chapter 1 shows the usual front-side power, fan and USB connectors. The board is not a back-connect design.10Spec databasebuildcores.com/products/Motherboard/xy81tonxw/ASUS-ROG-STRIX-B850-A-GAMING-WIFIRead 14 October 2026Back-Connect Connectors: No.

No1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026The Overview of Components chapter shows the usual front-side power, fan and USB connectors. The back-connect design is a separate model, MAG X870E TOMAHAWK MAX WIFI PZ.

RGB lighting on the boardiLEDs on the board itself. Headers for external lighting are counted under Internal connectors. True only when the maker's spec or feature list names lighting on the board. A single small LED that a reviewer sees does not count.

Yes2Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026The page describes subtle RGB lighting on the I/O shroud and ASUS Aura lighting.6Reviewchip.pl/2025/11/asus-rog-strix-b850-a-gaming-wifi-test-recenzja-opiniaRead 14 October 2026The review describes a lit ROG logo on the I/O shroud.

No5Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026Page 1: no integrated RGB lighting, only headers.7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026No onboard RGB, but connectors allow you to connect your own.

Power delivery

3 of 6 differ

Power stage layoutiAs the maker publishes it, e.g. 18+2+2. The first number is the CPU core (Vcore) rail. Makers group the other rails differently, so compare the first number. Doubled or teamed stages are written as the maker prints them, such as MSI's 12+2+1 Duet Rail. A review's count of real phases goes in the source note.

14+2+22Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 202614(80A)+2(80A)+2(80A) power stages: 14 Vcore, 2 SoC and 2 MISC.

14+2+12Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Key features: 14+2+1 Duet Rail Power System, dual 8-pin CPU power connectors.

CPU core (Vcore) power stagesiPower stages on the Vcore rail. Makers call them phases or power stages. A doubled design has more stages than controller phases. Use the first number of the maker's layout, such as 14 for MSI's 14+2+1 Duet Rail. A review's different count goes in the source note.

142Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026The VRM features 14+2+2 power stages.

145Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026Page 1: 17 phases, 14 of which are dedicated to Vcore (14x 80A SPS MOSFETs for Vcore in the spec table).7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026The board uses a 14+2+1 duet-rail design, with 14x 80A SPS for the CPU Vcore. In this design two stages receive the same signal from the PWM controller.

Vcore power stage ratingiCurrent rating of each Vcore power stage. Only a figure the maker or a copy of the maker's text states. A review's reading of the chip markings is not enough.

80A2Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026Each of the 14 Vcore stages is rated 80 A. The SoC and MISC stages are also 80 A. One product image alt text on the page says 110 amps and the body text says 80 A. The 80 A figure is stored.

80A5Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026Page 1 spec table: 14x 80A SPS MOSFETs for Vcore. The text says 80A MPS MPS2433 stages and 1,120A in total.7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 202614x 80A SPS for Vcore, MPS MP87670 stages, 1,120A in total.9Reviewnoticias3d.com/articulo/3856/msi-mag-x870e-tomahawk-wifi-review-rendimiento-precio-mejor-chipset.htmlRead 15 October 2026Review text: 14 phases of 80A smart power stages with digital control and a 14+2+1 layout.10Retailer pageamazon.com/dp/B0DT55ZJM7Read 15 October 2026About this item (MSI's text): 14 Duet Rail Power System (80A, SPS) VRM for the AMD X870E chipset.

VRM controlleriPWM controller chip with maker, e.g. MPS MP2857. One name: the maker's when published, otherwise the one name a review uses. No parentheses. Other names go in the source note. Use the part number without the date code in the chip marking.

Not available

MPS MPS24125Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026Page 1: power goes to a Monolithic Power Systems (MPS) MPS2412 controller, then to the 80A MPS2433 stages. Written MPS MPS2412 like the same chip on other products. Tech4Gamers names MPS MP87670 stages and no controller. MSI does not name the controller.

CPU power connectorsiEPS 12 V connectors for the CPU as pin counts, e.g. 8+8 pin, 8+4 pin or 8 pin.

8+8 pin1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Power related connectors: 1 x 24-pin main power and 2 x 8-pin +12V CPU power.

8+8 pin1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Power Connectors: 1x 24-pin ATX main, 2x 8-pin +12V and 1x 8-pin PCIe power connector.

Extra slot power connectoriA PCIe or other power connector on the board that feeds the expansion slots. The 24-pin and CPU connectors do not count. A connector the maker ties only to a front USB-C header does not count.

No1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026The power related connector list has no extra slot power connector. The page never states that one is absent.

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: 1x 8-pin PCIe power connector (PCIE_PWR1).

Memory

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Memory type

DDR51Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026

DDR51Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Memory: DDR5.

Memory slotsiDIMM slots on the board.

41Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026

41Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Memory: 4x DDR5 memory slots.

Max memoryiMaximum total capacity the maker states for the board. The maker's product page wins over an older manual, since a BIOS update can raise the value.

256GB1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026The page says max. 256GB. Tech-Critter's January 2025 hands-on text says 192GB. The page and the June 2025 manual say 256 GB and are stored.

256GB1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Memory: supporting up to 256GB.2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Memory: 4x DDR5 UDIMM, Maximum Memory Capacity 256GB.

Max memory speed (overclocked)iHighest overclocked speed the maker lists for one module per channel, with the newest CPU family the board is sold for, e.g. Ryzen 9000 or Core Ultra 200S. Ryzen 8000 values are never used. The source note names the family and the other module setups. It is not the CPU's official speed. A JEDEC-only list such as 5600/4800 is not this value. When the maker lists a manual overclock and a memory profile speed, the higher one is stored. The maker's product page wins over an older manual, since a BIOS update can raise the value. A table that names the CPU family wins over a headline speed that names none.

8,000MT/s1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Up to 8000+ MT/s (OC) with Ryzen 9000, 8000 and 7000 Series. The Ryzen 9000 value is stored. The overview page image text also shows 8400+.

8,400MT/s2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Ryzen 9000 Series processors max. overclocking frequency: 1DPC 1R up to 8400+ MT/s, 1DPC 2R and 2DPC 1R up to 6400+ MT/s and 2DPC 2R up to 4800+ MT/s. The 8400 value is stored. The table also lists DDR5 8400 to 5600 (OC) and 5600 to 4800 (JEDEC).

ECC memoryiThe board runs unbuffered ECC modules with ECC active. A board that runs ECC modules in non-ECC mode does not count. DDR5 on-die ECC does not count. A maker list of ECC and non-ECC unbuffered memory with no non-ECC mode qualifier counts as true, as on ASUS and ASRock AM5 boards. A note that ECC mode depends on the CPU, as ASUS writes for AM4 boards, still counts as true.

Yes1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026The page says ECC and Non-ECC, Un-buffered DIMM. The footnote says non-ECC DDR5 supports on-die ECC. The maker does not say how ECC works with each CPU.

No1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Memory: supports Non-ECC, Un-buffered memory.

CUDIMM supportiThe board runs clocked unbuffered DIMMs (CUDIMM) with the clock driver active. Clock driver bypass mode only does not count. A plain "Supports CUDIMM" with no bypass limit, as ASRock and ASUS write it, counts as true.

Not available

No1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Memory: supports CUDIMM, Clock Driver bypass mode only.

Expansion slots

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Expansion slotsiPhysical card slots. Storage M.2 slots are listed under Storage. The M.2 slot of a pre-installed Wi-Fi module is not listed. A full-length slot wired for x4 is PCIe x16 with 4 lanes.

AASUS ROG STRIX B850-A GAMING WIFI

Physical slot	Electrical lanes	PCIe generation	Connected to	Count
PCIe x16	16	5	CPU	1
PCIe x16	4	4	Chipset	1

Source1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Ryzen 9000 and 7000: 1 x PCIe 5.0 x16 slot. Ryzen 8000: the same slot runs PCIe 4.0 at x8 or x4. B850 chipset: 1 x PCIe 4.0 x16 slot at x4, which shares bandwidth with M.2_3. Stored with Ryzen 9000.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdfRead 14 October 2026The layout shows PCIEX16(G5) and PCIEX16(G4) as the only two expansion slots.

BMSI MAG X870E TOMAHAWK WIFI

Physical slot	Electrical lanes	PCIe generation	Connected to	Count
PCIe x16	16	5	CPU	1
PCIe x16	1	3	Chipset	1
PCIe x16	4	4	Chipset	1

Source1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Expansion Slots: 3x PCIe x16 slots. PCI_E1 from the CPU supports up to PCIe 5.0 x16 on Ryzen 9000 and 7000 (PCIe 4.0 x8 on Ryzen 8700, 8600 and 8400, and PCIe 4.0 x4 on Ryzen 8500 and 8300). PCI_E2 from the X870E chipset supports up to PCIe 3.0 x1. PCI_E3 from the chipset supports up to PCIe 4.0 x4. All three are full-length slots. The pre-installed Wi-Fi module sits in an M.2 Key-E slot, which is not listed.2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Slot table: 3x PCI-E x16. PCI_E1 PCIe 5.0 x16 from the CPU, PCI_E2 PCIe 3.0 x1 and PCI_E3 PCIe 4.0 x4, both from the chipset.

Full-length PCIe slotsiCounts full-length slots, whatever their lane count.

2=CalculatedFrom Expansion slots

3=CalculatedFrom Expansion slots

Fastest PCIe x16 slot generationiHighest PCIe generation of a full-length slot. This is normally the graphics card slot.

5=CalculatedFrom Expansion slots

5=CalculatedFrom Expansion slots

Storage

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M.2 storage slotsiOne row per M key storage slot on the board, front or back. Slots on an included add-in card are not listed. Values are with the CPU family that gives the board its full connectivity. A slot listed for 25110 counts as M.2 22110. A slot listed for 2260 counts as M.2 2280.

AASUS ROG STRIX B850-A GAMING WIFI

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives	Heatsink	Shares lanes with
M.2_1	5	4	CPU	M.2 2280	No	Yes	Not available
M.2_2	4	4	CPU	M.2 22110	No	Yes	Not available
M.2_3	4	4	Chipset	M.2 2280	No	Yes	M.2_3 is disabled when the PCIEX16(G4) slot is used
M.2_4	4	4	Chipset	M.2 2280	No	Yes	Not available

Source1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Total 4 x M.2 (Key M). Ryzen 9000 and 7000: M.2_1 type 2242/2260/2280 PCIe 5.0 x4 and M.2_2 type 2280/22110 PCIe 4.0 x4. Ryzen 8000: M.2_1 runs PCIe 4.0 x4 and M.2_2 runs PCIe 4.0 x4 or x2. Chipset: M.2_3 and M.2_4 type 2280 PCIe 4.0 x4. The page lists no M.2 SATA support, so sata is false for every slot. M.2_3 is disabled while PCIEX16(G4) is in use.2Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026Overview: 4 x M.2 slots, 1 x 2280 PCIe 5.0 x4, 2 x 2280 PCIe 4.0 x4 and 1 x 22110 PCIe 4.0 x4. 4 x M.2 heatsinks, with every M.2 slot covered, plus an M.2 backplate.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdfRead 14 October 2026The specification summary matches the page. M.2_3 shares bandwidth with PCIEX16(G4) and is disabled while that slot works. The manual lists M.2 types and PCIe modes only.

BMSI MAG X870E TOMAHAWK WIFI

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives	Heatsink	Shares lanes with
M2_1	5	4	CPU	M.2 22110	No	Yes	Not available
M2_2	5	4	CPU	M.2 2280	No	Yes	Rear USB 40Gbps Type-C ports. Both run at PCIe 5.0 x2 when a device is installed in M2_2. Setting M2_2 to x4 in the BIOS turns off the USB 40Gbps Type-C ports
M2_3	4	4	Chipset	M.2 2280	No	Yes	Not available
M2_4	4	4	Chipset	M.2 2280	No	Yes	Not available

Source1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, M.2 SSD Slots: M2_1 and M2_2 from the CPU, PCIe 5.0 x4 on Ryzen 9000 and 7000. M2_3 and M2_4 from the X870E chipset, PCIe 4.0 x4. M2_1 takes 2280 and 22110, the others 2260 and 2280. M2_1 is PCIe 4.0 x4 on Ryzen 8000. M2_2 is PCIe 4.0 x4 on Ryzen 8700, 8600 and 8400 and unavailable on Ryzen 8500 and 8300. The USB 40Gbps Type-C ports and M2_2 share PCIe 5.0 x4 bandwidth (footnote). No slot lists an M.2 SATA mode. The M.2 chapter shows heatsinks on all four slots: a screwless M.2 Shield Frozr over M2_1, one screwed heatsink over M2_2 and M2_3, and a screwless one over M2_4.2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Storage table: M.2_1 from the CPU (22110/2280), M.2_2 from the CPU (2280/2260), M.2_3 and M.2_4 from the chipset (2280/2260). The USB 40Gbps Type-C ports and M.2_2 share PCIe 5.0 x4 bandwidth.5Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026The text confirms two PCIe 5.0 x4 and two PCIe 4.0 x4 sockets and that M2_2 shares bandwidth with the 40 Gbps USB ports. It also says M.2_3 borrows lanes from the bottom PCIe slot and runs at PCIe 4.0 x2. MSI's manual and spec text say M.2_3 supports up to PCIe 4.0 x4, and Tech4Gamers says there is no bandwidth sharing between the PCIe and M.2 slots. The maker's figure is stored and this conflict is not.7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026All the M.2 slots come with dedicated heatsinks. The top and bottom ones are removed with a push (EZ M.2 Shield Frozr II) and the middle one has four screws. The intro says there is no bandwidth sharing between the PCIe and M.2 slots, which leaves out the maker's USB 40Gbps sharing with M2_2.9Reviewnoticias3d.com/articulo/3856/msi-mag-x870e-tomahawk-wifi-review-rendimiento-precio-mejor-chipset.htmlRead 15 October 2026Review text (Spanish): all four NVMe slots have cooling, and the main slot (22110) has an extra lower thermal pad.

M.2 slots

4=CalculatedFrom M.2 storage slots

4=CalculatedFrom M.2 storage slots

PCIe 5.0 M.2 slots

1=CalculatedFrom M.2 storage slots

2=CalculatedFrom M.2 storage slots

SATA portsiSATA 6Gb/s connectors on the board. SlimSAS connectors and M.2 slots that take SATA drives do not count.

21Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 20262 x SATA 6Gb/s ports. AMD RAIDXpert2 is listed for 9000, 8000 and 7000.

41Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: 4x SATA 6Gb/s ports (from X870E chipset).

Rear ports

5 of 5 differ

Rear portsiPhysical connectors on the rear I/O panel. Wi-Fi antenna connectors and buttons are not ports. 3.5 mm audio counts analog jacks of any role. A video input, such as the DisplayPort In of a Thunderbolt board, is Other.

AASUS ROG STRIX B850-A GAMING WIFI

Type	Version	Count	Max link rate (Gbps)	Power out (W)
USB-C	USB 3.2 Gen 2x2	1	20	Not available
USB-C	USB 3.2 Gen 2	1	10	15
USB-A	USB 3.2 Gen 2	2	10	Not available
USB-A	USB 3.2 Gen 1	4	5	Not available
USB-A	USB 2.0	2	0.48	Not available
HDMI	HDMI 2.1	1	Not available	Not available
DisplayPort	DisplayPort 1.4	1	Not available	Not available
Ethernet (RJ45)	Not available	1	2.5	Not available
3.5 mm audio	Not available	2	Not available	Not available
Optical S/PDIF	Not available	1	Not available	Not available

Source1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Back panel list: 1 USB 20Gbps (Type-C), 3 USB 10Gbps (2 Type-A and 1 Type-C), 4 USB 5Gbps (Type-A), 2 USB 2.0 (Type-A), 1 DisplayPort (max 8K@30Hz as specified in DisplayPort 1.4), 1 HDMI (4K@60Hz as specified in HDMI 2.1), 1 Wi-Fi module, 1 Intel 2.5Gb Ethernet, 2 audio jacks and 1 optical S/PDIF out. ASUS names USB by speed, so 20Gbps is stored as USB 3.2 Gen 2x2, 10Gbps as USB 3.2 Gen 2 and 5Gbps as USB 3.2 Gen 1. The footnote says USB Type-C power delivery output max 5V/3A, which sits on the 10Gbps Type-C line and is stored as 15 W. The overview page also says USB 10Gbps with up to 30W PD fast-charge. The spec page and the manual say 5V/3A and are stored. The Wi-Fi module and the two buttons are not ports.

BMSI MAG X870E TOMAHAWK WIFI

Type	Version	Count	Max link rate (Gbps)	Thunderbolt or USB4	DP Alt Mode
USB-C	USB4	2	40	USB4	Yes
USB-C	USB 3.2 Gen 2	1	10	Not available	Not available
USB-A	USB 3.2 Gen 2	2	10	Not available	Not available
USB-A	USB 3.2 Gen 1	3	5	Not available	Not available
USB-A	USB 2.0	4	0.48	Not available	Not available
HDMI	HDMI 2.1	1	Not available	Not available	Not available
Ethernet (RJ45)	Not available	1	5	Not available	Not available
3.5 mm audio	Not available	2	Not available	Not available	Not available
Optical S/PDIF	Not available	1	Not available	Not available	Not available

Source1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Back Panel Connectors: 1x HDMI, 1x USB 10Gbps Type-A from the CPU and 1x from the chipset, 3x USB 5Gbps Type-A, 2x USB 40Gbps Type-C (ASM4242, supporting DisplayPort over USB Type-C), 4x USB 2.0 Type-A, 1x USB 10Gbps Type-C, 1x 5G LAN (RJ45), 2x audio jacks (line-out and mic-in), 1x optical S/PDIF out. Onboard graphics: HDMI 2.1 with FRL up to 8K 60Hz, and USB4 ports with DisplayPort 1.4 HBR3 up to 4K 60Hz, only on processors with integrated graphics. MSI calls the 40Gbps ports USB4 and does not say Thunderbolt.2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026USB list: 4x USB 2.0 rear, 3x USB 5Gbps Type-A rear, 2x USB 10Gbps Type-A rear, 1x USB 10Gbps Type-C rear, 2x USB 40Gbps Type-C rear. HDMI 2.1 FRL up to 8K 60Hz. The USB4 ports support DisplayPort 1.4 with HBR3.

Rear USB ports

10=CalculatedFrom Rear ports

12=CalculatedFrom Rear ports

Rear USB-C portsiIncludes Thunderbolt and USB4 ports.

2=CalculatedFrom Rear ports

3=CalculatedFrom Rear ports

Fastest rear USB port

20Gbps=CalculatedFrom Rear ports

40Gbps=CalculatedFrom Rear ports

ThunderboltiThunderbolt on the rear panel. A header for an add-in card does not count.

Not available

No=CalculatedFrom Rear ports

Internal connectors

4 of 5 differ

Internal USB headersiHeaders for front-panel USB ports. The header count may be left out when the maker states only the front ports served.

AASUS ROG STRIX B850-A GAMING WIFI

Header	Max data rate (Gbps)	Headers	Front ports served
USB-C header	10	1	1
USB 3 header (19-pin)	5	1	2
USB 2.0 header (9-pin)	0.48	2	4

Source1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Front USB (total 7 ports): 1 x USB 10Gbps connector (supports USB Type-C), 1 x USB 5Gbps header for 2 ports and 2 x USB 2.0 headers for 4 ports. The Thunderbolt (USB4) header is for an add-in card and is not listed.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdfRead 14 October 2026Layout contents: 8. USB 10Gbps Type-C front panel connector, 9. USB 5Gbps header, 10. USB 2.0 header (two).

BMSI MAG X870E TOMAHAWK WIFI

Header	Max data rate (Gbps)	Headers	Front ports served	Power out (W)
USB-C header	20	1	1	27
USB 3 header (19-pin)	5	2	4	Not available
USB 2.0 header (9-pin)	0.48	2	4	Not available

Source1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Internal USB Connectors: 1x USB 20Gbps Type-C front panel port (JUSBC1, USB PD 27W fast charging), 2x USB 5Gbps connectors (four more ports) and 2x USB 2.0 connectors (four more ports).

Front USB-C header speed

10Gbps=CalculatedFrom Internal USB headers

20Gbps=CalculatedFrom Internal USB headers

Fan headersiAll fan and pump headers on the board, including CPU, CPU optional, AIO pump and chassis fan headers. Combination connectors that carry fan power together with other lines, such as MSI EZ Conn, do not count. A header that drives several fans, such as GIGABYTE 3_FANS, counts once. Headers on a hub that ships with the board and plugs into it, such as MSI's EZ CONTROL HUB, count. The source note splits board and hub.

71Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 20261 CPU fan, 1 CPU OPT fan, 1 AIO pump and 4 chassis fan headers, all 4-pin.

81Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, Fan Connectors: 1 CPU fan, 1 pump/system fan and 6 system fan connectors make 8. The JAF_2 EZ Conn-Header V2 carries fan, ARGB and USB 2.0 lines together and is not counted.

ARGB headersi3-pin 5 V addressable RGB headers. Combination connectors do not count. Headers on a hub that ships with the board and plugs into it, such as MSI's EZ CONTROL HUB, count. The source note splits board and hub.

31Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 20263 x Addressable Gen 2 headers.

31Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, LED Features: 3x 3-pin A-RAINBOW V2 (ARGB Gen2) LED connectors.

RGB headersi4-pin 12 V RGB headers. Headers on a hub that ships with the board and plugs into it, such as MSI's EZ CONTROL HUB, count. The source note splits board and hub.

03Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdfRead 14 October 2026The internal connector list names only 3 x Addressable Gen2 headers and no 4-pin RGB header.6Reviewchip.pl/2025/11/asus-rog-strix-b850-a-gaming-wifi-test-recenzja-opiniaRead 14 October 2026The reviewer writes that the board has three ARGB headers and no RGB header.10Spec databasebuildcores.com/products/Motherboard/xy81tonxw/ASUS-ROG-STRIX-B850-A-GAMING-WIFIRead 14 October 2026RGB 12V Headers: 0 and ARGB 5V Headers: 3.

11Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, LED Features: 1x 4-pin RGB LED connector.

Networking

4 of 9 differ

Ethernet controllersiOne item per Ethernet chip, as maker plus chip family without suffix letters, e.g. Realtek RTL8126 or Realtek RTL8125. Suffixes and revisions go in the source note. Leave it empty when no maker document or review names the chip. A Killer chip is written with Intel as its maker, such as Intel Killer E3100G.

Intel I2266Reviewchip.pl/2025/11/asus-rog-strix-b850-a-gaming-wifi-test-recenzja-opiniaRead 14 October 2026The review names an Intel I226-V 2.5 Gb Ethernet chip. ASUS writes only Intel 2.5Gb Ethernet. The -V suffix is dropped.

Realtek RTL81261Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: 1x Realtek 8126 5Gbps LAN controller. Tom's Hardware writes the part as 8126VB. Stored as the chip family RTL8126.5Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026Page 1 spec table: Realtek 8126VB (5 GbE).7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026Spec table: Realtek 8126VB 5G LAN.

Ethernet ports

1=CalculatedFrom Rear ports

1=CalculatedFrom Rear ports

Ethernet speediFastest Ethernet port.

2.5Gbps=CalculatedFrom Rear ports

5Gbps=CalculatedFrom Rear ports

Wi-Fi includediA Wi-Fi module comes installed. A board sold with and without Wi-Fi is two products.

Yes1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026A Wi-Fi module is listed on the back panel (1 x Wi-Fi module).

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: the Wireless module is pre-installed in the M.2 (Key-E) slot.

Wi-Fi standard

Wi-Fi 71Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 20262x2 Wi-Fi 7 (802.11be).

Wi-Fi 71Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: Wi-Fi 7, 802.11 a/b/g/n/ac/ax/be.

Wi-Fi bandsiBands the installed module supports.

2.4 GHz, 5 GHz, 6 GHz1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Supports 2.4/5/6GHz frequency band. The 6 GHz band and bandwidth vary by country.

2.4 GHz, 5 GHz, 6 GHz1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: 2.4GHz/5GHz/6GHz (320MHz). 6GHz support may depend on each country's regulations.

Max Wi-Fi channel widthiWidest channel the installed module supports, e.g. 320 or 160. It follows the Wi-Fi module, so a board revision can change it.

160MHz1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Supports Wi-Fi 7 160MHz bandwidth, up to 2.9Gbps. The overview page also says 160 MHz channels on 6GHz.

320MHz1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: 320MHz on the 6GHz band, up to 5.8Gbps.

Wi-Fi moduleiChip as published. A board revision can change the chip. One name: the maker's when published, otherwise the one name a review uses. No parentheses. Other names go in the source note. Use the chip's part number with its maker when any source gives it, such as Qualcomm QCNCM865 for a module also written NCM865. A platform name such as FastConnect 7800 is used only when no part number is published.

MediaTek MT79256Reviewchip.pl/2025/11/asus-rog-strix-b850-a-gaming-wifi-test-recenzja-opiniaRead 14 October 2026The review names Wi-Fi 7 MediaTek MT7925 with Bluetooth 5.4. ASUS does not name the module. The 160 MHz and 2.9 Gbps figures on the ASUS page fit this module.

Not available

BluetoothiVersion of the Bluetooth radio on the Wi-Fi module.

5.41Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Bluetooth v5.4. The page says the version may vary and refers to the Wi-Fi module maker.

5.41Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: Bluetooth 5.4. MSI says the version may be updated by the Wi-Fi chip vendor.

Audio

0 of 2 differ

Audio codeciMaker and model, e.g. Realtek ALC4080. A board revision can change the codec.

Realtek ALC40801Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026ROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080 with a Savitech SV3H712 amplifier. The Savitech part is an amplifier and is not stored as a DAC.

Realtek ALC40801Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications: Realtek ALC4080, 7.1-channel USB high performance audio.

DAC chipiA separate DAC chip next to the codec, e.g. ESS ES9219. Maker plus part number as the maker writes it, with suffix letters, e.g. ESS ES9219Q. A marketing name that stands for a part number is written as the part number, so ESS SABRE9219 is ESS ES9219 and the maker wording goes in the source note. Leave it empty on boards with only a codec.

Not available

Not available

Features

4 of 7 differ

BIOS flashbackiA button that updates the BIOS from a USB drive without a CPU or memory installed. Maker names include BIOS FlashBack, Flash BIOS Button and Q-Flash Plus.

Yes1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026BIOS FlashBack button on the back panel.

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Back panel list: Flash BIOS button.

Clear CMOS button (rear)iA button on the rear panel that resets the BIOS settings. A jumper or header does not count. A board whose only clear CMOS button sits on the board itself is false.

Yes1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Clear CMOS button on the back panel.

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Back panel list: Clear CMOS button. The jumper JBAT1 is not what is stored.

POST code displayiA two-digit display that shows boot codes, e.g. ASUS Q-Code or ASRock Dr. Debug. Single status LEDs do not count. Taken from the maker's spec or manual only. A review spec table is not enough.

No3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdfRead 14 October 2026The layout contents list Q-LEDs (CPU, DRAM, VGA and boot device), a BIOS FlashBack LED and an 8-pin CPU power plug LED. No two-digit code display is listed in the specification summary or the layout. The manual never states that it is absent.

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026LED Features: 1x EZ Digi-Debug LED, with a debug code table in the Onboard LEDs chapter. It is a two-digit display. The 4 EZ Debug LEDs are single status LEDs.5Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026Spec table: Diagnostics Panel with 4 Post Status LEDs and a 2-character Debug LED.9Reviewnoticias3d.com/articulo/3856/msi-mag-x870e-tomahawk-wifi-review-rendimiento-precio-mejor-chipset.htmlRead 15 October 2026Review text: the board has debug with a numeric code.

Power button on the boardiA power or start button on the board itself, for use outside a case. A button with another label counts when the maker says it can turn the PC on, such as GIGABYTE's quick button labelled RESET. A button on the rear I/O panel counts. A button on a module that ships fitted to the board, such as MSI's EZ BRIDGE, counts.

Yes1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Internal connectors, miscellaneous: 1 x Power button.3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdfRead 14 October 2026Layout item 14: Start button, which powers up the system.

No1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026The Overview of Components and Onboard LEDs chapters list no power or start button on the board. The rear Clear CMOS and Flash BIOS buttons and the EZ PCIe Release button are the only buttons.

Dual BIOSiTwo BIOS chips, so the board can start from the second chip after a failed update. Two flash chips alone do not count.

Not available

No1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Specifications, BIOS Features: 1x 256 Mb flash. No second BIOS is listed.

Pre-installed I/O shieldiThe rear I/O shield is fixed to the board.

Yes1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026ASUS EZ DIY list: Pre-mounted I/O shield.

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Special Features, EZ DIY: Pre-installed I/O Shield.7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026The I/O shield is stainless steel and comes preinstalled on the board.

Tool-free featuresiM.2 latch holds a drive without a screw. M.2 heatsink comes off without a tool. PCIe slot release is a button or lever that frees the graphics card. Push-on antenna connector fits the Wi-Fi antenna without screwing.

Tool-free M.2 latch, Tool-free M.2 heatsink, PCIe slot release, Push-on antenna connector1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026ASUS Q-Design: M.2 Q-Latch, M.2 Q-Release, M.2 Q-Slide, PCIe Slot Q-Release Slim and Q-Antenna.2Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026Q-Release lets the M.2 heatsink come off with a switch and no tiny screws. Q-Latch installs M.2 SSDs with one press. PCIe Slot Q-Release Slim unlocks the card by tilting it. Q-Antenna snaps the Wi-Fi antenna into place.

Tool-free M.2 latch, Tool-free M.2 heatsink, PCIe slot release1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Special Features, EZ DIY: EZ M.2 Clip II, EZ PCIe Release, and thermal feature M.2 Shield Frozr. Two M.2 heatsinks are screwless and the heatsink over M2_2 and M2_3 needs a screwdriver. The EZ Antenna is plugged in with a tight connection and the connector type is not stated, so the push-on antenna option is not set.2Maker product pagede-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Key features: EZ DIY with EZ M.2 Shield Frozr II, EZ M.2 Clip II, EZ PCIe Release and EZ Antenna.7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026EZ PCIe release button on the primary slot. Top and bottom M.2 heatsinks are tool-free (EZ M.2 Shield Frozr II) and the middle one is screw-secured.10Retailer pageamazon.com/dp/B0DT55ZJM7Read 15 October 2026About this item: double-sided EZ M.2 Shield Frozr II and EZ M.2 Clip II.

Measured

3 of 3 differ

VRM temperature under CPU loadiHighest VRM temperature a reviewer measured during a sustained all-core CPU stress test at stock settings. Compare only results from the same reviewer and CPU. The reviewer's probe reading when given, otherwise the board sensor. The sensor and the CPU package power during the test go in the source note.

Not available

55°C6Measurementtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-review/3Read 15 October 2026Page 3: AIDA64 System Stability Test, all threads, 30 minutes, stock CPU. The Ryzen 9 9900X peaked at approximately 55 C on Tom's sensors (thermocouples on the VRM) and 60 C on the board's internal sensor. The CPU averaged around 155 W (the chart shows about 26 C ambient). The thermocouple reading is stored. Test system: Ryzen 9 9900X, Arctic Liquid Freezer II 420, Crucial T705 2TB, RTX 4080, EVGA 850 W PSU, BIOS with AGESA 1.2.0.3c, default settings with the memory EXPO profile on.

Power draw idleiWhole test system at the wall at idle, measured by a reviewer. Compare only results from the same reviewer and CPU. A chart of CPU and board power without a wall meter does not count.

Not available

80W6Measurementtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-review/3Read 15 October 2026Page 3 Power Consumption chart, MSI X870E Tomahawk Wifi: idle 80 W. Whole PC at the wall with a Kill-A-Watt meter, monitor excluded, Windows balanced power plan. The text of the page quotes 264 W and 80 W for the B850 Tomahawk MAX, which looks like a copy error, because the chart gives 74 W and 250 W for the B850 Tomahawk and 80 W and 264 W for this board.

Power draw CPU stressiWhole test system at the wall at the peak of a CPU stress test, measured by a reviewer. The graphics card is not loaded. Compare only results from the same reviewer and CPU. A chart of CPU and board power without a wall meter does not count.

Not available

264W6Measurementtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-review/3Read 15 October 2026Page 3 Power Consumption chart, MSI X870E Tomahawk Wifi: load 264 W peak (average 172 W) in the AIDA64 System Stability Test with CPU, FPU, cache and memory stressed. Whole PC at the wall with a Kill-A-Watt meter, Ryzen 9 9900X at stock settings, graphics card not loaded.

In the box

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In the boxiItems as the maker lists them.

2 x SATA 6Gb/s cables, 1 x ASUS WiFi Q-Antenna, 1 x Cable ties package, 1 x M.2 Q-Latch package, 1 x M.2 Q-Slide package, 1 x ROG key chain, 1 x ROG Strix stickers, 4 x M.2 rubbers, 1 x Quick start guide1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026Accessories list on the specification page, the same as the manual's package contents.

Quick installation guide, European Union Regulatory Notices, USB drive, 2 x SATA cables, EZ Front Panel Cable, 1 to 3 EZ Conn-Cable (V2), EZ Wi-Fi Antenna, EZ M.2 Clip II Remover, M.2 Plate Screw1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026Package Contents: motherboard, quick installation guide, EU regulatory notices, USB drive, 2 SATA cables, EZ Front Panel Cable, 1 to 3 EZ Conn-Cable (V2), EZ Wi-Fi Antenna, EZ M.2 Clip II Remover and M.2 plate screw. Tom's Hardware and Tech4Gamers also list cable stickers, which the manual leaves out.7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026Unboxing: quick installation guide, EU regulatory notice, 2 SATA data cables, EZ M.2 Clip II remover, M.2 plate screw, EZ WiFi antenna, 1-to-3 EZ Conn-Cable (V2), EZ front panel cable, USB drive, cable stickers and a flyer. It confirms the maker's list.

Links

Not compared

Product page

rog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi2Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifiRead 14 October 2026

www.msi.com/Motherboard/MAG-X870E-TOMAHAWK-WIFI13Maker product pagemsi.com/Motherboard/MAG-X870E-TOMAHAWK-WIFIRead 15 October 2026The link appears in web search results for this model. msi.com blocks agents, so the page was not read and its content is not used for any value.

Spec sheet

rog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/spec1Maker product pagerog.asus.com/motherboards/rog-strix/rog-strix-b850-a-gaming-wifi/specRead 14 October 2026

storage-asset.msi.com/specSheet/it/mb/MAG%20X870E%20TOMAHAWK%20WIFI.pdf13Maker product pagemsi.com/Motherboard/MAG-X870E-TOMAHAWK-WIFIRead 15 October 2026MSI's spec sheet PDF (Italian version) and datasheet appear in web search results. They are on msi.com's file host, which was not opened, and no value comes from them.

Manual

dlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdf3Owner's manualdlcdnets.asus.com/pub/ASUS/mb/SocketAM5/ROG_STRIX_B850-A_GAMING_WIFI/E26438_ROG_STRIX_B850-A_GAMING_WIFI_EM_v3_WEB.pdfRead 14 October 2026ASUS user guide E26438, Revised Edition v3, June 2025, from dlcdnets.asus.com.

www.trovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdf1Owner's manualtrovaprezzi.it/manuali/msi_mag_x870e_tomahawk_wifi.pdfRead 15 October 2026MSI MAG X870E TOMAHAWK WIFI User Guide, hosted by trovaprezzi.it. The maker's own manual page was not readable.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

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Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

3years8Retailer pageamazon.com/dp/B0DPLP33YRRead 14 October 2026Warranty Description: 3 Years (US listing).9Retailer pagescan.co.uk/products/asus-rog-strix-b850-a-gaming-wifiRead 14 October 2026Scan UK: 36 months return to base.

3years3Maker product pageuk-store.msi.com/products/mag-x870e-tomahawk-wifiRead 15 October 2026Warranty: 3-year warranty.5Reviewtomshardware.com/reviews/msi-x870e-tomahawk-wifi-motherboard-reviewRead 15 October 2026Spec table: Warranty 3 Years.7Reviewtech4gamers.com/msi-mag-x870e-tomahawk-wifi-reviewRead 15 October 2026Pros and spec notes: warranty 3 years.10Retailer pageamazon.com/dp/B0DT55ZJM7Read 15 October 2026Warranty Description: 3 Year Manufacturer.

Both are also in the API. Back to all motherboards.