arkivoAPI
Menu

PC parts / Motherboards

MSI MAG B850M MORTAR WIFI

MSIGaming motherboard

MAG B850M MORTAR WIFI

Released March 2025.1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Revision history: Version 1.0, 2025/03, First release. Last checked 16 October 2026.

CPU socket
AM5
Chipset
AMD B850
Form factor
Micro-ATX
M.2 slots
3

66 of 78 fields known.

Compare with another motherboardDownload JSONDownload CSVGet it from the API

At a glance

Ports

  • USB-C USB 3.2 Gen 2x2
  • USB-C USB 3.2 Gen 2
  • 3 USB-A USB 3.2 Gen 2
  • 4 USB-A USB 3.2 Gen 1
  • HDMI 2.1
  • Ethernet (RJ45)
  • 2 3.5 mm audio
  • Optical S/PDIF
  • USB-C header
  • USB 3 header (19-pin)
  • 2 USB 2.0 header (9-pin)

All specs

SourceCalculated

General

Series
MAG1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Cover: MAG Series Motherboard, MAG B850M MORTAR WIFI.
Model numbers
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.
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.
Announced
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.
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.
Predecessor
Not available
Successor
Not available
Launch price (US)
Not available
Launch price (EU)
Not available
Markets
Not available
Colours
Not available
Segment
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.
Board revision
Not available

Platform

CPU socket
AM51Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026
Chipset
AMD B8501Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026
Supported processors
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.
CPU overclocking
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.

Board

Front and side, drawn to scale.

Form factor
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).
Board dimensions
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.
PCB layers
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.
Back-connect design
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.
RGB lighting on the board
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.

Power delivery

Power stage layout
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.
CPU core (Vcore) power stages
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.
Vcore power stage rating
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.
VRM controller
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.
CPU power connectors
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.
Extra slot power connector
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.

Memory

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.
Memory slots
41Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026
Max memory
256GB1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026
Max memory speed (overclocked)
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.
ECC memory
No1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: Supports Non-ECC, Un-buffered memory.
CUDIMM support
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.

Expansion slots

Expansion slots
Physical slotElectrical lanesPCIe generationConnected toCount
PCIe x16165CPU1
PCIe x444Chipset1
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.
Full-length PCIe slots
1
Fastest PCIe x16 slot generation
5

Storage

M.2 storage slots
SlotPCIe generationPCIe lanesConnected toLongest driveTakes SATA drivesHeatsink
M2_154CPUM.2 2280NoYes
M2_254CPUM.2 2280NoYes
M2_342ChipsetM.2 2280NoNo
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.
M.2 slots
3
PCIe 5.0 M.2 slots
2
SATA ports
41Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 4x SATA 6Gb/s ports from the B850 chipset.

Rear ports

Rear ports
TypeVersionCountMax link rate (Gbps)
USB-CUSB 3.2 Gen 2x2120
USB-CUSB 3.2 Gen 2110
USB-AUSB 3.2 Gen 2310
USB-AUSB 3.2 Gen 145
HDMIHDMI 2.11Not available
Ethernet (RJ45)Not available15
3.5 mm audioNot available2Not available
Optical S/PDIFNot available1Not 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.
Rear USB ports
9
Rear USB-C ports
2
Fastest rear USB port
20Gbps
Thunderbolt
Not available

Internal connectors

Internal USB headers
HeaderMax data rate (Gbps)HeadersFront ports served
USB-C header1011
USB 3 header (19-pin)512
USB 2.0 header (9-pin)0.4824
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.
Front USB-C header speed
10Gbps
Fan headers
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.
ARGB headers
31Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 3x 3-pin A-RAINBOW V2 (ARGB Gen2) LED connectors.
RGB headers
11Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: 1x 4-pin RGB LED connector (JRGB1, 12 V).

Networking

Ethernet controllers
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.
Ethernet ports
1
Ethernet speed
5Gbps
Wi-Fi included
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.
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 bands
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.
Max Wi-Fi channel width
320MHz1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Specifications: MU-MIMO TX/RX, 320MHz, up to 5.8Gbps.
Wi-Fi module
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.
Bluetooth
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.

Audio

Audio 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.
DAC chip
Not available

Features

BIOS flashback
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.
Clear CMOS button (rear)
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.
POST code display
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.
Power button on the board
Not available
Dual BIOS
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.
Pre-installed I/O shield
Yes1Owner's manualtrovaprezzi.it/manuali/msi_mag_b850m_mortar_wifi.pdfRead 14 October 2026Special Features, EZ DIY: Pre-installed I/O Shield.
Tool-free features
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.

Measured

VRM temperature under CPU load
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.
Power draw idle
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.
Power draw CPU stress
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.

In the box

In the box
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.

Warranty

Manufacturer warranty (source market)
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.

Compare with

Pick a motherboard to see both side by side. Differences are marked yellow.

More motherboard comparisons

Sources

We read 12 sources for this motherboard. The numbers match the markers in the sheet.

  1. Read 14 October 2026Backs 39 fields
  2. Read 14 October 2026Backs 6 fields
  3. Read 14 October 2026Backs 1 field
  4. Read 14 October 2026Backs 1 field
  5. Read 14 October 2026Backs 5 fields
  6. Read 14 October 2026Backs 1 field
  7. Read 14 October 2026Backs 8 fields
  8. Read 14 October 2026Backs 4 fields
  9. Read 14 October 2026Backs 1 field
  10. Read 14 October 2026Backs 6 fields
  11. Read 14 October 2026Backs 4 fields
  12. Read 14 October 2026Backs 2 fields

See a wrong value? Tell us and name the field.