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ASRock B850I Lightning WiFi vs ASUS ROG STRIX B850-A GAMING WIFI

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Product A: ASRock

B850I Lightning WiFi

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B

Product B: ASUS

ROG STRIX B850-A GAMING WIFI

62 of 78 known

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Only differences

AASRock B850I Lightning WiFi

BASUS ROG STRIX B850-A GAMING WIFI

General

2 of 9 differ

Series

Phantom Gaming4Reviewfunkykit.com/reviews/motherboards/asrock-phantom-gaming-b850i-lightning-wifi-motherboard-reviewRead 14 October 2026The review is titled ASRock Phantom Gaming B850I Lightning WiFi.

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.

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

B850I Lightning WiFi1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Cover and specification chapter name the board B850I Lightning WiFi.

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.

GTIN / EAN

Not available

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.

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

Not available

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.

Status

Available7Retailer pageparadigit.ie/asrock-b850i-lightning-wifi/21862530/productRead 14 October 2026Listed as in stock with delivery in 4 to 5 working days on 2026-10-14.

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).

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

Not available

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.

Gaming2Press articlegdm.or.jp/pressrelease/2025/0110/570624Read 14 October 2026The release calls the B850I Lightning WiFi a Mini-ITX gaming motherboard.

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).

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

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Platform

0 of 4 differ

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

AM51Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026

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

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 B8501Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026

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

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 Series1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Specifications, page 2: AMD Socket AM5 Ryzen 9000, 8000 and 7000 Series Processors. The slot lines depend on the CPU.

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.

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

Yes4Reviewfunkykit.com/reviews/motherboards/asrock-phantom-gaming-b850i-lightning-wifi-motherboard-reviewRead 14 October 2026The review describes the AMD B850 chipset as having enhanced overclocking capabilities, quoting AMD.8Maker product pageamd.com/en/products/processors/chipsets/am5.htmlRead 14 October 2026AMD's AM5 chipset page says the B850 platform features enhanced overclocking capabilities and lists Ryzen processor overclocking enabled for B850. This is the chip maker's page, not the board maker's.

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.

Board

3 of 5 differ

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

Mini-ITX1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Specifications, page 2: Mini-ITX form factor.

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

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.

Width170Height170mm(6.7 × 6.7 in)4Reviewfunkykit.com/reviews/motherboards/asrock-phantom-gaming-b850i-lightning-wifi-motherboard-reviewRead 14 October 2026The board measures 17.0 x 17.0 cm, the Mini-ITX 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).

PCB layersiCopper layers in the circuit board as published.

81Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Specifications, page 2: 8 Layer PCB.4Reviewfunkykit.com/reviews/motherboards/asrock-phantom-gaming-b850i-lightning-wifi-motherboard-reviewRead 14 October 2026The 10+1+1 phase power design sits on a 8-Layer PCB.

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.

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.

No1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026The layout on pages 6 and 7 shows the usual front-side power, fan and USB connectors. The board is not a back-connect design.

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.

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.

No4Reviewfunkykit.com/reviews/motherboards/asrock-phantom-gaming-b850i-lightning-wifi-motherboard-reviewRead 14 October 2026The review names ASRock Polychrome RGB and SignalRGB support through the two ARGB headers and describes no lighting on the board.

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.

Power delivery

4 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.

10+1+12Press articlegdm.or.jp/pressrelease/2025/0110/570624Read 14 October 202610+1+1 phase power circuit using 110A SPS.4Reviewfunkykit.com/reviews/motherboards/asrock-phantom-gaming-b850i-lightning-wifi-motherboard-reviewRead 14 October 202610+1+1 Phase Power Design with 110A SPS for VCore, copied from the maker's text.

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.

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.

105Reviewpcunboxing.com/en/asrock-b850i-lightning-wifiRead 14 October 202610+1+1 phase Dr. MOS SPS: the 10-phase 110A SPS handles CPU Vcore, 1 phase handles SOC and 1 phase VDD MISC.

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

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.

110A2Press articlegdm.or.jp/pressrelease/2025/0110/570624Read 14 October 2026110A SPS is stated for the 10+1+1 phase circuit. FunkyKit's copy of the maker's text says 110A SPS for VCore and PC Unboxing says the 10 Vcore phases use 110A stages.4Reviewfunkykit.com/reviews/motherboards/asrock-phantom-gaming-b850i-lightning-wifi-motherboard-reviewRead 14 October 2026110A SPS for VCore, copied from the maker's text.5Reviewpcunboxing.com/en/asrock-b850i-lightning-wifiRead 14 October 2026The 10-phase 110A SPS is responsible for CPU Vcore.

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.

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

Not available

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

8 pin1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 5: 1x 8 pin 12V power connector (Hi-Density Power Connector, ATX12V1) and the 24-pin ATX connector.

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.

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.

No1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026The connector list on page 5 has no extra slot power connector. FunkyKit's text calls the 8-pin CPU connector a PCIe power connector. The layout shows one 8-pin connector, ATX12V1.

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.

Memory

3 of 6 differ

Memory type

DDR51Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026

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

Memory slotsiDIMM slots on the board.

21Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026

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

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.

128GB1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 2: max. capacity of system memory 128GB.

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.

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.

8,200MT/s1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 2: DDR5 up to 8200+(OC). The manual names no CPU family. Ryzen 9000 is the newest family of the board. It refers to the Memory Support List on the maker's website.

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+.

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.

Yes1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 2: supports DDR5 ECC/non-ECC, un-buffered memory. The manual does not say whether ECC works with every CPU.

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.

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

Not available

Expansion slots

2 of 3 differ

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.

AASRock B850I Lightning WiFi

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

Source1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 2: 1x PCIe 5.0 x16 slot (PCIE1) from the CPU. PCIE1 runs Gen5x16 with Ryzen 9000 and 7000, Gen4x8 with Ryzen 8000 (Phoenix 1) and Gen4x4 with Ryzen 8000 (Phoenix 2). The vertical M.2 socket (Key E) for the Wi-Fi module is not listed.

BASUS 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.

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

1=CalculatedFrom Expansion slots

2=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

2 of 4 differ

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.

AASRock B850I Lightning WiFi

Slot	PCIe generation	PCIe lanes	Connected to	Longest drive	Takes SATA drives	Heatsink
M2_1	5	4	CPU	M.2 2280	No	Yes
M2_2	4	4	Chipset	M.2 2280	No	No

Source1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 4: M2_1 (Blazing M.2, CPU) takes type 2280 at PCIe Gen5x4, M2_1 runs Gen5x4 with Ryzen 9000 and 7000 and Gen4x4 with Ryzen 8000. M2_2 (Hyper M.2, chipset) takes type 2280 at PCIe Gen4x4. Pages 50 to 55 show an M.2 heatsink with screws on M2_1 and none on M2_2, which is on the back of the board. The manual names no SATA mode for either slot and no lane sharing. FunkyKit and PC Unboxing confirm M2_1 has a heatsink and M2_2 sits on the back, and PC Unboxing says both slots take 2280 only.4Reviewfunkykit.com/reviews/motherboards/asrock-phantom-gaming-b850i-lightning-wifi-motherboard-reviewRead 14 October 20261 x Blazing M.2 (PCIe Gen5x4) with heatsink and 1 x Hyper M.2 (PCIe Gen4x4) on the back of the board.5Reviewpcunboxing.com/en/asrock-b850i-lightning-wifiRead 14 October 2026M2_1 is the only PCIe Gen5 x4 slot (CPU direct) with a single-sided thermal pad to a heatsink. The Hyper M.2 slot on the back is PCIe Gen4 x4. Both take 2280 only.

BASUS 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.

M.2 slots

2=CalculatedFrom M.2 storage slots

4=CalculatedFrom M.2 storage slots

PCIe 5.0 M.2 slots

1=CalculatedFrom M.2 storage slots

1=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.

21Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 4: 2x SATA3 6.0 Gb/s connectors.5Reviewpcunboxing.com/en/asrock-b850i-lightning-wifiRead 14 October 2026Two SATA 6Gb/s connectors.

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.

Rear ports

4 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.

AASRock B850I Lightning WiFi

Type	Version	Count	Max link rate (Gbps)	DP Alt Mode
USB-C	USB 3.2 Gen 2	1	10	Yes
USB-A	USB 3.2 Gen 2	2	10	Not available
USB-A	USB 3.2 Gen 1	1	5	Not available
USB-A	USB 2.0	4	0.48	Not available
HDMI	HDMI 2.1	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

Source1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Pages 4 and 9: 1 USB 3.2 Gen2 Type-C (10 Gb/s, DP-alt mode DP1.4a), 2 USB 3.2 Gen2 Type-A (10 Gb/s), 1 USB 3.2 Gen1 Type-A, 4 USB 2.0, 1 HDMI 2.1 (4K 120Hz), 1 RJ-45 2.5G LAN, 1 line out jack, 1 microphone input jack and 1 optical S/PDIF out. The manual notes that the Type-C port supports a maximum speed of 40 Gb/s with selected processors. NoobFeed ties USB4 to 8000G series processors. Ryzen 9000 is the reference family, so 10 Gbps is stored. The BIOS Flashback button and the two antenna ports are not ports.

BASUS 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.

Rear USB ports

8=CalculatedFrom Rear ports

10=CalculatedFrom Rear ports

Rear USB-C portsiIncludes Thunderbolt and USB4 ports.

1=CalculatedFrom Rear ports

2=CalculatedFrom Rear ports

Fastest rear USB port

10Gbps=CalculatedFrom Rear ports

20Gbps=CalculatedFrom Rear ports

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

Not available

Not available

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.

AASRock B850I Lightning WiFi

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

Source1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 5: 1 USB 2.0 header for 2 ports, 1 USB 3.2 Gen1 header for 2 ports and 1 front panel Type-C USB 3.2 Gen1 header. PC Unboxing calls the front Type-C 10Gbps, which conflicts with the manual, so the manual value is stored.

BASUS 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).

Front USB-C header speed

5Gbps=CalculatedFrom Internal USB headers

10Gbps=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.

31Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 5 and the layout: CPU_FAN1, CHA_FAN1 and AIO_PUMP are the three 4-pin fan headers. The thermistor header is not a fan header.

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.

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.

21Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 5: 2x addressable LED headers (3-pin ADDR_LED1 and ADDR_LED2).

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

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.

01Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 5 lists only the two addressable LED headers and the layout shows no 4-pin RGB header.

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.

Networking

5 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 Killer E3100G1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 3: 2.5 Gigabit LAN, Killer E3100G. Killer chips are Intel's, so it is written 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.

Ethernet ports

1=CalculatedFrom Rear ports

1=CalculatedFrom Rear ports

Ethernet speediFastest Ethernet port.

2.5Gbps=CalculatedFrom Rear ports

2.5Gbps=CalculatedFrom Rear ports

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

Yes1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 3: 802.11axe Wi-Fi 6E module in a vertical M.2 (Key E) socket.

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).

Wi-Fi standard

Wi-Fi 6E1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 3: 802.11axe Wi-Fi 6E, supports IEEE 802.11a/b/g/n/ac/ax/axe.

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 bandsiBands the installed module supports.

2.4 GHz, 5 GHz, 6 GHz1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 3: dual-band 2x2 with extended 6GHz band support, and the box includes 2.4/5/6 GHz antennas. The 6 GHz band depends on country regulation.

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.

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.

Not available

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.

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.

Not available

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.

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

5.21Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 3: supports Bluetooth 5.2.

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.

Audio

1 of 2 differ

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

Realtek ALC12201Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 3: 7.1 CH HD Audio with Content Protection (Realtek ALC1220 Audio 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.

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.

Yes1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 4 and section 2.13: 1x BIOS Flashback button on the rear panel.

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

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.

No1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 8 lists a Clear CMOS jumper (CLRCMOS1). The only rear panel button is BIOS Flashback.

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

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.

No1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026The manual lists no debug display. The layout has none. The power LED table in the system panel header section describes boot states.

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.

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.

No1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026The manual layout lists no power or reset button on the board. Section 2.13 says the only smart button is BIOS Flashback.

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.

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

No1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 5: AMI UEFI Legal BIOS. Dual BIOS is not stated.

Not available

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

Yes6Reviewnoobfeed.com/hardware/asrock-b850i-lightning-wifi-am5-itx-reviewRead 14 October 2026The IO shield is already set up when it comes. The review also names a MediaTek Wi-Fi 6E card without a model, so wifi_module is left out.

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.

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.

Not available

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.

Measured

None of 3 known

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

Not available

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

Not available

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

Not available

In the box

1 of 1 differ

In the boxiItems as the maker lists them.

2 x Serial ATA (SATA) data cables, 2 x ASRock WiFi 2.4/5/6 GHz antennas, 2 x screws for M.2 sockets, 1 x Thermistor cable1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026Page 1 package contents, without the board. The manual marks each item Optional. FunkyKit adds an installation guide, a regulatory notice and two velcro straps.

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.

Links

Not compared

Product page

pg.asrock.com/mb/AMD/B850I%20Lightning%20WiFi/index.asp9Maker product pagepg.asrock.com/mb/AMD/B850I%20Lightning%20WiFi/index.aspRead 14 October 2026asrock.com blocks agents, so the page was not read. Its address is from the job brief. No value comes from it.

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

Spec sheet

Not available

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

Manual

download.asrock.com/Manual/B850I%20Lightning%20WiFi.pdf1Owner's manualdownload.asrock.com/Manual/B850I%20Lightning%20WiFi.pdfRead 14 October 2026ASRock B850I Lightning WiFi User Manual, version 1.0, published November 2024, 65 pages, English PDF on download.asrock.com.

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.

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

Not available

Warranty

1 of 1 differ

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.

Not available

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.

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