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MSI MAG B850M MORTAR WIFI vs MSI PRO B850M-A WIFI

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Product A: MSI

MAG B850M MORTAR WIFI

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B

Product B: MSI

PRO B850M-A WIFI

63 of 78 known

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Only differences

AMSI MAG B850M MORTAR WIFI

BMSI PRO B850M-A WIFI

General

3 of 9 differ

Series

MAG1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Cover: MAG Series Motherboard, MAG B850M MORTAR WIFI.

PRO1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Cover: PRO Series Motherboard, PRO B850M-A WIFI.

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

MAG B850M MORTAR WIFI, 7E61-001R, 911-7E61-0011Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026The manual names only MAG B850M MORTAR WIFI. 7E61-001R and 911-7E61-001 are from BuildCores, Geizhals and the MSI Italia e-shop.2Maker product pageit-store.msi.com/products/mag-b850m-mortar-wifi-scheda-madreRead 14 October 2026MSI Italia e-shop (it-store.msi.com, vendor MSI Italia) lists the order codes 911-7E61-001 and 911-7E61-008. Only 911-7E61-001 is stored, because it matches BuildCores. The page carries the maker's spec tab text.12Spec databasebuildcores.com/products/Motherboard/lswl3ubs7/MSI-B850M-MAG-MORTAR-WIFI-AM5-DDR5-Micro-ATXRead 14 October 2026Part numbers: MAG B850M MORTAR WIFI, 7E61-001R and 911-7E61-001.

PRO B850M-A WIFI1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026The manual names only PRO B850M-A WIFI. The PRO B850M-A WIFI PZ back-connect board is a separate MSI model. No order code or regional model number was found.

GTIN / EAN

4711377321150, 82414241079011Retailer pagescan.co.uk/products/msi-mag-b850m-mortar-wifi-amd-b850-am5-ddr5-pcie-50-3x-m2-5g-wifi7-usb-32-aplusc-amd-expo-atxRead 14 October 2026EAN 4711377321150. BuildCores adds UPC 824142410790.12Spec databasebuildcores.com/products/Motherboard/lswl3ubs7/MSI-B850M-MAG-MORTAR-WIFI-AM5-DDR5-Micro-ATXRead 14 October 2026UPC 824142410790 and EAN 4711377321150. A third EAN 4526541059315 is listed for Japan and is not stored.

8241424254599Spec databasebuildcores.com/products/Motherboard/ys4ci1k5t/MSI-PRO-B850M-A-WIFIRead 14 October 2026UPC 824142425459, also shown as EAN 0824142425459. The PZ board has its own code.

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

January 20255Press articleclub386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platformRead 14 October 2026Article of 2025-01-06 (CES) presents the MAG B850M MORTAR WIFI with the new MSI B850 boards.

6 January 20256Press articleclub386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platformRead 14 October 2026Article of 2025-01-06 announces the Pro B850M-A WiFi with the MSI B850 lineup.

Status

Available10Spec databasegeizhals.de/msi-mag-b850m-mortar-wifi-a3383554.htmlRead 14 October 2026Listed with offers from many shops on 2026-10-14. BuildCores shows it in stock at Walmart, Newegg and B&H. MSI Italia's e-shop showed it unavailable that day.

Available8Spec databasegeizhals.de/msi-pro-b850m-a-wifi-a3383558.htmlRead 14 October 2026Listed with offers on geizhals.eu on 2026-10-14. The base page showed no offers in one snapshot. BuildCores shows it in stock at Newegg and Walmart.9Spec databasebuildcores.com/products/Motherboard/ys4ci1k5t/MSI-PRO-B850M-A-WIFIRead 14 October 2026Shows Newegg at 168.99 USD and Walmart at 172.99 USD in stock on 2026-10-14.

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

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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 pageit-store.msi.com/products/mag-b850m-mortar-wifi-scheda-madreRead 14 October 2026MAG is MSI's gaming series. The e-shop text sells a fast gaming experience and the board carries the MSI Arsenal Gaming mark. Geizhals files it as Mainstream.

Mainstream2Maker spec sheet (PDF)storage-asset.msi.com/datasheet/mb/in/PRO-B850M-A-WIFI.pdfRead 14 October 2026The datasheet cover carries the tagline Business and Elegance, and the board sits in MSI's PRO series. MSI names no gaming or creator use.

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

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

AM51Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026

AM51Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 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 manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026

AMD B8501Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 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 manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications, CPU row: AMD Ryzen 9000/8000/7000 Series Desktop Processors, socket AM5. The manual points to msi.com for the newest support list. Read on 2026-10-14.

AMD Ryzen 9000 Series, AMD Ryzen 8000 Series, AMD Ryzen 7000 Series1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications, CPU row: AMD Ryzen 9000/8000/7000 Series Desktop Processors, socket AM5. The manual points to msi.com for the newest support list. Read on 2026-10-14.

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

Yes2Maker product pageit-store.msi.com/products/mag-b850m-mortar-wifi-scheda-madreRead 14 October 2026The page lists Core Boost, Memory Boost and Memory Overclocking and AMD EXPO under Ultra Performance. The chipset page of AMD is the primary source.4Maker product pageamd.com/en/products/processors/chipsets/am5.htmlRead 14 October 2026AMD B850 Chipset: featuring enhanced overclocking capabilities, DDR5 memory support with AMD EXPO and PCIe 5 for NVMe storage.

Yes1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Page 29 says the board is designed to support overclocking. The Special Features list names Core Boost and Memory Boost. The B850 chipset allows CPU overclocking. AMD's chipset page could not be opened on 2026-10-14.

Board

1 of 5 differ

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

Micro-ATX1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications, Form Factor row: M-ATX, 9.6 in. x 9.6 in. (243 mm x 243 mm).

Micro-ATX1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications, Form Factor row: mATX, 9.6 in. x 9.6 in. (244 mm x 244 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.

Width244Height244mm(9.6 × 9.6 in)1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 9.6 in. x 9.6 in. (243 mm x 243 mm). The manual's millimetre figure is cut short. 9.6 in is 243.84 mm, which Scan UK lists and which rounds to the stored 244 mm.

Width244Height244mm(9.6 × 9.6 in)1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 244 mm x 244 mm. Guru3D, Netcodex and the MSI Taiwan store give 243.84 mm, the exact conversion of 9.6 in.

PCB layersiCopper layers in the circuit board as published.

82Maker product pageit-store.msi.com/products/mag-b850m-mortar-wifi-scheda-madreRead 14 October 2026Ultra Performance: 8-layer PCB with 2oz thick copper.5Press articleclub386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platformRead 14 October 2026Eight-layer PCB.7Reviewtech4gamers.com/msi-mag-b850m-mortar-wifi-reviewRead 14 October 20268-layered PCB with 2oz thickened copper.11Retailer pagescan.co.uk/products/msi-mag-b850m-mortar-wifi-amd-b850-am5-ddr5-pcie-50-3x-m2-5g-wifi7-usb-32-aplusc-amd-expo-atxRead 14 October 20268 layers, 2oz thickened copper.

63Maker product pagemy-store.msi.com/products/msi-pro-b850m-a-wifi-matx-motherboardRead 14 October 2026Product details: 6-layer PCB made by 2oz thickened copper and server-grade level material.4Maker product pagetw-store.msi.com/products/pro-b850m-a-wifiRead 14 October 2026The Chinese text says a 6-layer server-grade PCB with 2oz copper. One search result summary of MSI's global page mentioned 8 layers, which no maker page or document confirmed.6Press articleclub386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platformRead 14 October 2026Six-layer 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 manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026The component overview on pages 27 to 54 shows the usual front-side power, fan and front-panel connectors. The board is not a back-connect design.

No1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026The component overview on page 27 shows the usual front-side power, fan and front-panel connectors. The back-connect board is the separate PRO B850M-A 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.

No7Reviewtech4gamers.com/msi-mag-b850m-mortar-wifi-reviewRead 14 October 2026There is no RGB on the board, only room for your own through the RGB headers.8Reviewthefpsreview.com/2025/07/28/msi-b850m-mortar-wifi-motherboard-reviewRead 14 October 2026The review says the board has no on-board LEDs.

No1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications, LED Features: 4x EZ Debug LED, 1x EZ Memory Detection LED and the RGB and ARGB headers. The list names no lighting on the board itself. BuildCores shows Lighting: None.9Spec databasebuildcores.com/products/Motherboard/ys4ci1k5t/MSI-PRO-B850M-A-WIFIRead 14 October 2026Lighting: none listed. The headers are for external devices.

Power delivery

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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.

12+2+12Maker product pageit-store.msi.com/products/mag-b850m-mortar-wifi-scheda-madreRead 14 October 2026Ultra Performance: Duet Rail power system 12+2+1, dual 8-pin CPU power connectors.5Press articleclub386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platformRead 14 October 2026MSI's launch text through Club386: 12+2+1 power phases rated at 60A, shrunk from the Tomahawk.

8+2+13Maker product pagemy-store.msi.com/products/msi-pro-b850m-a-wifi-matx-motherboardRead 14 October 2026Product details: Direct 8+2+1 Power System 60A SPS, 8+4-pin CPU power connectors.4Maker product pagetw-store.msi.com/products/pro-b850m-a-wifiRead 14 October 2026Text names an 8+2+1 Duet Rail power system with dual 8+4-pin CPU power connectors.6Press articleclub386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platformRead 14 October 2026MSI's launch text through Club386: 8+2+1 phases rated at 60A.7Press articleguru3d.com/story/msi-pro-b850ma-wifi-microatx-motherboard-with-wifi-7-and-5-gigabit-lanRead 14 October 20268+2+1 phase design with 60A smart power stages.10Spec databasemaxmybuild.com/motherboards/msi-pro-b850m-a-wifiRead 14 October 20268+2+1 power stage layout, 60A SPS.

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.

127Reviewtech4gamers.com/msi-mag-b850m-mortar-wifi-reviewRead 14 October 202612x 60A DRPS stages for the CPU in a 12+2+1 Duet Rail design.8Reviewthefpsreview.com/2025/07/28/msi-b850m-mortar-wifi-motherboard-reviewRead 14 October 202612+2+1 Duet Rail with Smart Power Stages.10Spec databasegeizhals.de/msi-mag-b850m-mortar-wifi-a3383554.htmlRead 14 October 2026VRM row: 12x 60 A MP87661 smart power stages for VCORE, 2 for SOC and 1 for misc. Geizhals also calls it 8 real CPU phases (6+2) with 14 virtual phases.

88Spec databasegeizhals.de/msi-pro-b850m-a-wifi-a3383558.htmlRead 14 October 2026VRM row: 8+2+1, 8x 60 A MP87661 smart power stages for VCORE, 2 for SOC and 1 for misc.

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.

60A5Press articleclub386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platformRead 14 October 202612+2+1 phases rated at 60A.7Reviewtech4gamers.com/msi-mag-b850m-mortar-wifi-reviewRead 14 October 202612x 60A phases for the CPU.8Reviewthefpsreview.com/2025/07/28/msi-b850m-mortar-wifi-motherboard-reviewRead 14 October 2026Smart Power Stages rated at 60 A each.10Spec databasegeizhals.de/msi-mag-b850m-mortar-wifi-a3383554.htmlRead 14 October 202612x 60 A MP87661 (Monolithic Power Systems) for VCORE.11Retailer pagescan.co.uk/products/msi-mag-b850m-mortar-wifi-amd-b850-am5-ddr5-pcie-50-3x-m2-5g-wifi7-usb-32-aplusc-amd-expo-atxRead 14 October 2026The VRM section copies MSI's text: 12 Vcore Power - SPS 60A, 2 SOC and 1 Misc. The overview text of the same page says 14+2+1, which looks like a copy from another board and is not used.

60A3Maker product pagemy-store.msi.com/products/msi-pro-b850m-a-wifi-matx-motherboardRead 14 October 2026Direct 8+2+1 Power System 60A SPS.6Press articleclub386.com/msi-launches-mid-and-entry-motherboards-for-amds-am5-platformRead 14 October 20268+2+1 phases rated at 60A.7Press articleguru3d.com/story/msi-pro-b850ma-wifi-microatx-motherboard-with-wifi-7-and-5-gigabit-lanRead 14 October 202660A smart power stages.

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.

Richtek RT3678BE10Spec databasegeizhals.de/msi-mag-b850m-mortar-wifi-a3383554.htmlRead 14 October 2026PWM controller row: RT3678BE (max 10 phases) and RT3672EE (max 2 phases). Both are Richtek. The Vcore controller is stored. No review names a controller, and this is one aggregator.

Richtek RT3678BE8Spec databasegeizhals.de/msi-pro-b850m-a-wifi-a3383558.htmlRead 14 October 2026PWM controller row: RT3678BE (max 10 phases) and RT3672EE (max 2 phases). Geizhals names no maker. The RT3678 family is Richtek's. The Vcore controller is stored. No review names a controller, and this is one aggregator.

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 pin1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications, Power Connectors: 1x 24-pin ATX, 2x 8-pin +12V and 1x 8-pin PCIe power connector.

8+4 pin1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications, Power Connectors: 1x 24-pin ATX, 1x 8-pin +12V, 1x 4-pin +12V and 1x 8-pin PCIe power connector.3Maker product pagemy-store.msi.com/products/msi-pro-b850m-a-wifi-matx-motherboardRead 14 October 20268+4-pin CPU power connectors.

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.

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications and page 44: PCIE_PWR1, an 8-pin PCIe power connector. The Special Features list names it Supplemental PCIe Power Connector.

Yes1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications and page 41: PCIE_PWR1, an 8-pin PCIe power connector. The Special Features list names it Supplemental PCIe Power Connector.

Memory

0 of 6 differ

Memory type

DDR51Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications, Memory row: 4x DDR5 memory slots, supporting up to 256GB, dual channel.

DDR51Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications, Memory row: 4x DDR5 memory slots, supporting up to 256GB, dual channel. The slots have a single latch.

Memory slotsiDIMM slots on the board.

41Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026

41Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 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.

256GB1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026

256GB1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026

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/s2Maker product pageit-store.msi.com/products/mag-b850m-mortar-wifi-scheda-madreRead 14 October 2026Memory Support: DDR5 8200 - 5600 (OC) MT/s. Ryzen 9000 maximum overclocking: 1DPC 1R up to 8200+ MT/s, 1DPC 2R up to 6400+, 2DPC 1R up to 6400+ and 2DPC 2R up to 6400+. The stored 8200 is the one-module-per-channel, one-rank value for Ryzen 9000. The JEDEC list is 5600 - 4800 MT/s.

8,200MT/s2Maker spec sheet (PDF)storage-asset.msi.com/datasheet/mb/in/PRO-B850M-A-WIFI.pdfRead 14 October 2026Memory Support: 4 DIMMs, Dual Channel DDR5 - 8200+ MT/s (OC). The maker names no CPU family and no module setup for the figure. The MSI Malaysia store and the Taiwan store say the same. The JEDEC range is 5600 to 4800 MT/s.

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.

No1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: Supports Non-ECC, Un-buffered memory.

No1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 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.

No1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: Supports CUDIMM, Clock Driver bypass mode only. CUDIMM boot frequency may vary by CPU series, with manual overclocking after boot.

No1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 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.

AMSI MAG B850M MORTAR WIFI

Physical slot	Electrical lanes	PCIe generation	Connected to	Count
PCIe x16	16	5	CPU	1
PCIe x4	4	4	Chipset	1

Source1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications and page 33: PCI_E1 is PCIe 5.0 x16 from the CPU for Ryzen 9000 and 7000. It runs PCIe 4.0 x8 with Ryzen 8700, 8600 and 8400, and PCIe 4.0 x4 with Ryzen 8500 and 8300. PCI_E2 is a PCIe x4 slot, PCIe 4.0 x4 from the B850 chipset. The page 33 drawing shows it shorter than the x16 slot.

BMSI PRO B850M-A WIFI

Physical slot	Electrical lanes	PCIe generation	Connected to	Count
PCIe x16	16	5	CPU	1
PCIe x16	4	4	Chipset	1
PCIe x1	1	3	Chipset	1

Source1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications and page 32: 2x PCIe x16 slots and 1x PCIe x1 slot. PCI_E1 is from the CPU, PCIe 5.0 x16 with Ryzen 9000 and 7000. It runs PCIe 4.0 x8 with Ryzen 8700, 8600 and 8400, and PCIe 4.0 x4 with Ryzen 8500 and 8300. PCI_E3 is a x16 slot from the B850 chipset, up to PCIe 4.0 x4. PCI_E2 is the x1 slot from the chipset, up to PCIe 3.0 x1. Guru3D also writes the second slot as PCIe 4.0 x4 in x16 physical size.

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

3 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.

AMSI MAG B850M MORTAR 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	5	4	CPU	M.2 2280	No	Yes
M2_3	4	2	Chipset	M.2 2280	No	No

Source1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications and pages 36 to 40, Ryzen 9000 values. M2_1 and M2_2 are from the CPU, PCIe 5.0 x4, and take 2260 and 2280 drives. M2_3 is from the B850 chipset, PCIe 4.0 x2, 2280 only, and sits on the bottom of the board. M2_1 and M2_2 are covered by the screwless EZ M.2 Shield Frozr II. The M2_3 install steps use a screw and no heatsink. With Ryzen 8000, M2_1 runs PCIe 4.0 x4 and M2_2 runs PCIe 4.0 x4 or x2 by model. No slot lists an M.2 SATA mode, so sata is false.

BMSI PRO B850M-A 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	CPU	M.2 2280	No	No

Source1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications and pages 33 to 37, Ryzen 9000 values. M2_1 is from the CPU, up to PCIe 5.0 x4 (PCIe 4.0 x4 with Ryzen 8000), 2260 and 2280 drives, under the screwless EZ M.2 Shield Frozr II heatsink. M2_2 is from the CPU, up to PCIe 4.0 x4 (PCIe 4.0 x2 with Ryzen 8500 and 8300), 2260 and 2280 drives. The M2_2 install steps show a clip and no heatsink. MaxMyBuild and Geizhals agree that only one M.2 slot has a heatsink. No slot lists an M.2 SATA mode, so sata is false. The Wi-Fi module sits in a separate M.2 Key-E slot.10Spec databasemaxmybuild.com/motherboards/msi-pro-b850m-a-wifiRead 14 October 2026M.2 heatsinks: slot 1 only.

M.2 slots

3=CalculatedFrom M.2 storage slots

2=CalculatedFrom M.2 storage slots

PCIe 5.0 M.2 slots

2=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.

41Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 4x SATA 6Gb/s ports from the B850 chipset.

41Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 4x SATA 6Gb/s ports from the B850 chipset.

Rear ports

3 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.

AMSI MAG B850M MORTAR WIFI

Type	Version	Count	Max link rate (Gbps)
USB-C	USB 3.2 Gen 2x2	1	20
USB-C	USB 3.2 Gen 2	1	10
USB-A	USB 3.2 Gen 2	3	10
USB-A	USB 3.2 Gen 1	4	5
HDMI	HDMI 2.1	1	Not available
Ethernet (RJ45)	Not available	1	5
3.5 mm audio	Not available	2	Not available
Optical S/PDIF	Not available	1	Not available

Source1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications and page 23: 3x USB 10Gbps Type-A (CPU), 1x USB 10Gbps Type-C (CPU), 4x USB 5Gbps Type-A, 1x USB 20Gbps Type-C (B850 chipset), 1x HDMI 2.1 with FRL, 1x 5Gbps LAN, 2 audio jacks (line-out and mic-in) and 1 optical S/PDIF out. MSI's speed names are stored as USB-IF names: 5Gbps as USB 3.2 Gen 1, 10Gbps as Gen 2 and 20Gbps as Gen 2x2. HDMI output works only with a CPU that has integrated graphics. The two Wi-Fi antenna connectors and the Clear CMOS and Flash BIOS buttons are not ports. The manual gives no USB power or DisplayPort alt mode figures.

BMSI PRO B850M-A WIFI

Type	Version	Count	Max link rate (Gbps)
USB-C	USB 3.2 Gen 2	2	10
USB-A	USB 3.2 Gen 2	3	10
USB-A	USB 3.2 Gen 1	3	5
HDMI	HDMI 2.1	1	Not available
DisplayPort	DisplayPort 1.4	1	Not available
Ethernet (RJ45)	Not available	1	5
3.5 mm audio	Not available	3	Not available

Source1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications and pages 19 and 23: 3x USB 10Gbps Type-A (CPU), 2x USB 10Gbps Type-C (B850 chipset), 3x USB 5Gbps Type-A (B850 chipset), 1x DisplayPort 1.4, 1x HDMI 2.1, 1x 5G LAN (RJ45) and 3 audio jacks (line-in, line-out, mic-in). The MSI datasheet agrees. MSI's speed names are stored as USB-IF names: 5Gbps as USB 3.2 Gen 1 and 10Gbps as Gen 2. DisplayPort and HDMI work only with a CPU that has integrated graphics, 4K 60 Hz. The manual gives no USB power output or DisplayPort alt mode figures. The two Wi-Fi antenna connectors and the Clear CMOS and Flash BIOS buttons are not ports.

Rear USB ports

9=CalculatedFrom Rear ports

8=CalculatedFrom Rear ports

Rear USB-C portsiIncludes Thunderbolt and USB4 ports.

2=CalculatedFrom Rear ports

2=CalculatedFrom Rear ports

Fastest rear USB port

20Gbps=CalculatedFrom Rear ports

10Gbps=CalculatedFrom Rear ports

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

Not available

Not available

Internal connectors

1 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.

AMSI MAG B850M MORTAR 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

Source1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications and pages 46 to 47: JUSBC1 is 1x USB 10Gbps Type-C front port. JUSB3 is one 5Gbps connector for 2 ports. JUSB1 and JUSB2 are two USB 2.0 connectors for 4 ports.

BMSI PRO B850M-A 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

Source1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications and pages 43 and 44: JUSBC1 is 1x USB 10Gbps Type-C front port. JUSB3 is one 5Gbps connector for 2 ports. JUSB1 and JUSB2 are two USB 2.0 connectors for 4 ports.

Front USB-C header speed

10Gbps=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.

61Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 1x CPU fan, 1x water-pump/system fan and 4x system fan connectors. The 7-pin EZ Conn-Header V1 (JAF_1) carries fan and ARGB signals together and is not counted.

51Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 1x 4-pin CPU fan, 1x 4-pin water-pump/system fan and 3x 4-pin system fan connectors. The 7-pin EZ Conn connector carries a fan and ARGB 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.

31Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 3x 3-pin A-RAINBOW V2 (ARGB Gen2) LED connectors.

31Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 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.

11Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 1x 4-pin RGB LED connector (JRGB1, 12 V).

11Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 1x 4-pin RGB LED connector (JRGB1).

Networking

2 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.

Realtek RTL81261Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: Realtek 8126-VB 5Gbps LAN controller. The suffix -VB is left out.

Realtek RTL81261Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 1x Realtek 8126 5Gbps LAN controller. Retailer listings and Geizhals add the suffix VB, which is left out.

Ethernet ports

1=CalculatedFrom Rear ports

1=CalculatedFrom Rear ports

Ethernet speediFastest Ethernet port.

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.

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: the wireless module is pre-installed in the M.2 (Key-E) slot.

Yes1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: the wireless module is pre-installed in the M.2 (Key-E) slot. This applies to PRO B850M-A WIFI only.

Wi-Fi standard

Wi-Fi 71Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 802.11 a/b/g/n/ac/ax/be, Wi-Fi 7.

Wi-Fi 71Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 802.11 a/b/g/n/ac/ax/be.

Wi-Fi bandsiBands the installed module supports.

2.4 GHz, 5 GHz, 6 GHz1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 2.4GHz/5GHz/6GHz. 6 GHz may depend on each country's regulations.

2.4 GHz, 5 GHz, 6 GHz1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: 2.4GHz/5GHz/6GHz. 6 GHz 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.

320MHz1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: MU-MIMO TX/RX, 320MHz, up to 5.8Gbps.

160MHz1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: MU-MIMO TX/RX, 2.4GHz/5GHz/6GHz (160MHz) up to 2.9Gbps.

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.

Qualcomm QCNCM8659Reviewmezha.ua/en/reviews/oglyad-materinskoji-plati-msi-mag-b850m-mortar-wifi-vdaliy-balans-u-formati-matx-305429Read 14 October 2026Review of 2025-10-24: tri-band Wi-Fi 7 module, Qualcomm QCNCM865, up to 320 MHz and 5.8 Gb/s. Geizhals gives the same chip. MSI's other boards use the names NCM865 and FastConnect 7800 for the same family. Mezha also prints the wrong audio codec ALC4020.10Spec databasegeizhals.de/msi-mag-b850m-mortar-wifi-a3383554.htmlRead 14 October 2026WLAN/Bluetooth: Wi-Fi 7 (2x2, Qualcomm QCNCM865), Bluetooth 5.4.

Not available

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

5.41Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: Bluetooth 5.4, MLO, 4KQAM. The version may be updated by the Wi-Fi chipset vendor.

5.41Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications: Bluetooth 5.4, MLO, 4KQAM. The version may be updated by the Wi-Fi chipset vendor.

Audio

1 of 2 differ

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

Realtek ALC40801Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications, Audio row: Realtek ALC4080 Codec, 7.1-channel USB high performance audio. Mezha prints ALC4020, which the manual contradicts.

Realtek ALC8971Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications, Audio row: Realtek ALC897 Codec, 7.1-channel High Definition Audio. Geizhals and Netcodex say the same.

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

0 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 manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications and page 23: Flash BIOS button on the rear panel, with a Flash BIOS port (USB 5Gbps Type-A). Page 64 explains the update.

Yes1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications and page 23: Flash BIOS button on the rear panel, with a Flash BIOS port (USB 10Gbps Type-A).

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.

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications and page 23: Clear CMOS button on the rear panel. JBAT1 is a second jumper.

Yes1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications and page 23: Clear CMOS button on the rear panel. JBAT1 is a second jumper.

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 manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications and Onboard LEDs page: 4x EZ Debug LED and 1x EZ Memory Detection LED. They are single status LEDs. No two-digit display is listed.7Reviewtech4gamers.com/msi-mag-b850m-mortar-wifi-reviewRead 14 October 2026The review sees 4 debug LEDs and says there is no debug code LED panel.

No1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications, LED Features: 4x EZ Debug LED and 1x EZ Memory Detection LED. They are single status LEDs and the manual lists no two-digit display.

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.

Not available

Not available

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 manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications, BIOS Features: 1x 256 Mb flash. Dual BIOS is not stated.

No1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Specifications, BIOS Features: 1x 256 Mb flash. Dual BIOS is not stated.

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

Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Special Features, EZ DIY: Pre-installed I/O Shield.

Yes1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Special Features, EZ DIY: Pre-installed 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.

Tool-free M.2 latch, Tool-free M.2 heatsink, PCIe slot release1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Special Features, EZ DIY: EZ M.2 Shield Frozr II (screwless heatsink, pages 37 to 39), EZ M.2 Clip II (locks the SSD without a screw) and EZ PCIe Release (button, page 33 to 35). The Wi-Fi antenna cables are screwed on, so antenna_connector is not stored.

Tool-free M.2 latch, Tool-free M.2 heatsink, PCIe slot release1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Special Features, EZ DIY: EZ M.2 Shield Frozr II (screwless M2_1 heatsink, pages 34 to 36), EZ M.2 Clip II (locks the SSD without a screw) and EZ PCIe Clip II (release for the graphics card). The Wi-Fi antenna cables are screwed on (page 26), so antenna_connector is not stored.

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.

51.5°C8Reviewthefpsreview.com/2025/07/28/msi-b850m-mortar-wifi-motherboard-reviewRead 14 October 2026Review of 2025-07-28. Cinebench R23 multi-core for at least 15 minutes with readings at the 15 minute mark, ambient about 24 C, Ryzen 9 7900X, cooler not stated. HWiNFO64 reads 51.5 C for the hottest MOSFET (board sensor, stored) and a handheld infrared thermometer reads 43.8 C at the power area. Tech4Gamers writes 57 C with a 9950X and no method, and Mezha 46 to 53 C with a 9700X.

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.

106W7Reviewtech4gamers.com/msi-mag-b850m-mortar-wifi-reviewRead 14 October 2026Review of 2025-03-24: 106 W at idle. Test system: Ryzen 9 9950X, ARCTIC Liquid Freezer II 420, RTX 4090, AGESA 1.2.0.2. The text calls the figures combined power consumption and does not name the meter. The method is not stated, so this is read as whole system power.

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.

359W7Reviewtech4gamers.com/msi-mag-b850m-mortar-wifi-reviewRead 14 October 2026Same review: 359 W under load, Cinebench 2024 multicore, same test system. The meter is not named.

Not available

In the box

1 of 1 differ

In the boxiItems as the maker lists them.

1x Motherboard, 1x Quick installation guide, 1x European Union Regulatory Notices, 1x SATA cable, 1x EZ Front Panel Cable, 1x 1 to 2 EZ Conn-Cable (V1), 1x EZ Wi-Fi antenna, 2x EZ M.2 Clip II, 1x EZ M.2 Clip II Remover, 1x M.2 screw (1 set/pack)1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Package Contents, page 22.

1x Motherboard, 1x Quick installation guide, 1x European Union Regulatory Notices, 1x SATA cable, 1 x 1 to 2 EZ Conn-Cable (V1), 1x EZ Wi-Fi Antenna, 2x EZ M.2 Clip II, 1x EZ M.2 Clip II Remover1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026Package Contents, page 22.

Links

Not compared

Product page

www.msi.com/Motherboard/MAG-B850M-MORTAR-WIFI3Maker product pagemsi.com/Motherboard/MAG-B850M-MORTAR-WIFIRead 14 October 2026The URL comes from the job evidence and search results. msi.com blocks agents, so the page was not opened. Specifications were read from the user guide and the MSI Italia e-shop instead.

www.msi.com/Motherboard/PRO-B850M-A-WIFI5Maker product pagemsi.com/Motherboard/PRO-B850M-A-WIFIRead 14 October 2026The URL comes from the job evidence and search results. msi.com blocks agents, so the page was not opened. Specifications were read from the user guide, the datasheet and MSI's regional stores.

Spec sheet

Not available

storage-asset.msi.com/datasheet/mb/in/PRO-B850M-A-WIFI.pdf2Maker spec sheet (PDF)storage-asset.msi.com/datasheet/mb/in/PRO-B850M-A-WIFI.pdfRead 14 October 2026One-page MSI datasheet for PRO B850M-A WIFI, generated 2025-10-31, on MSI's datasheet server.

Manual

www.trovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdf1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026MSI user guide for MAG B850M MORTAR WIFI, hosted by trovaprezzi.it (72 pages). Revision history: Version 1.0, 2025/03, First release. msi.com blocks agents, so the maker's own copy was not opened.

static.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdf1Owner's manualstatic.buildcores.com/part-attachments/6ca91b70-bec1-4089-823a-42e63ffd6950_PROB850M-AWIFI_PROB850M-A_English.pdfRead 14 October 2026MSI User Guide for PRO B850M-A WIFI (66 pages), hosted by buildcores.com. msi.com blocks agents, so the maker's own copy was not opened.

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.

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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.

3years10Spec databasegeizhals.de/msi-mag-b850m-mortar-wifi-a3383554.htmlRead 14 October 2026Warranty 3 Jahre. Scan UK states 36 months.11Retailer pagescan.co.uk/products/msi-mag-b850m-mortar-wifi-amd-b850-am5-ddr5-pcie-50-3x-m2-5g-wifi7-usb-32-aplusc-amd-expo-atxRead 14 October 202636 months, direct, for the UK market.

3years3Maker product pagemy-store.msi.com/products/msi-pro-b850m-a-wifi-matx-motherboardRead 14 October 2026MSI Malaysia store: 3 years limited warranty. Geizhals says 3 years too.8Spec databasegeizhals.de/msi-pro-b850m-a-wifi-a3383558.htmlRead 14 October 2026Warranty 3 Jahre.

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