An ATX AM5 motherboard with AMD B850: four DDR5 slots rated up to DDR5-8400+ (OC), a PCIe 5.0 x16 graphics slot, four M.2 slots (two PCIe 5.0 x4), Realtek 5 Gb Ethernet and Wi-Fi 7.
Specifications checked 21 Sept 2026.
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A Micro-ATX AM5 motherboard with AMD B850: four DDR5 slots rated up to DDR5-8200+ (OC), a PCIe 5.0 x16 graphics slot, three M.2 slots (two PCIe 5.0 x4), Realtek 5 Gb Ethernet and Wi-Fi 7.
Specifications checked 8 Sept 2026.
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THE DIFFERENCES, MADE VISIBLE
Visual facts
Differences first. Select a topic for its graphic, sources and conditions.
How to read this comparison
Manufacturer facts for the exact models shown. Not a quality rating or a test result.
“Different” means the known values differ, not that one is better.
Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.
SPECIFICATIONS SIDE BY SIDE8 topics
SELECTED TOPIC
01 / 08
Form factor
Check the exact configuration and source conditions for your use.
MSI MAG B850 TOMAHAWK MAX WIFIATX; 304.8 × 243.84 mm
Manufacturer specification · Board dimensions, not retail packaging. Check case mounting positions, clearance and cable routing.
Plan the complete platform. Check the exact CPU-support list, required BIOS and memory validation before buying. PCIe generations and lane allocations can change with the processor. A socket match or slot count is not a guarantee that every component works together at its highest advertised setting.
MSI MAG B850 TOMAHAWK MAX WIFI4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8400+ (OC); AMD EXPO; non-ECC unbuffered; CUDIMM support
MSI MAG B850M MORTAR WIFI4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8200+ (OC); AMD EXPO; non-ECC unbuffered; CUDIMM support
Sources
MSI MAG B850 TOMAHAWK MAX WIFI
The overclocked speed is MSI's 1DPC 1R maximum with Ryzen 9000; MSI lists 1DPC 2R, 2DPC 1R and 2DPC 2R up to 6400+ MT/s. JEDEC speeds are 4800–5600 MT/s. CUDIMMs run in clock-driver bypass mode only. · Manufacturer specification · Manufacturer capacity ceiling for this exact board, not included memory or a performance measurement. CPU, BIOS, DIMM population and the validated-module list determine support. DDR5 slots require DDR5 modules; DDR4 and DDR5 are not interchangeable. CUDIMM support is bypass mode only; compatibility depends on CPU and BIOS, and some combinations may not boot. Check the exact memory support list.
The overclocked speed is MSI's 1DPC 1R maximum with Ryzen 9000; MSI lists 1DPC 2R, 2DPC 1R and 2DPC 2R up to 6400+ MT/s. JEDEC speeds are 4800–5600 MT/s. CUDIMMs run in clock-driver bypass mode only. · Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable.
M2_1 and M2_2 connect to the CPU (PCIe 5.0 x4); M2_3 (PCIe 4.0 x2) and M2_4 (PCIe 4.0 x4) connect to the chipset. M2_1 accepts drives up to 22110; the others up to 2280. · Manufacturer specification · With Ryzen 8000, M2_1 runs at PCIe 4.0 x4. M2_2 runs at PCIe 4.0 x2 with Ryzen 8500/8300, or PCIe 4.0 x4 with other Ryzen 8000 CPUs. PCI_E3 runs at x2 when M2_3 is used; selecting PCI_E3 x4 in BIOS disables M2_3.
M2_1 and M2_2 connect to the CPU; M2_3 connects to the chipset. All three accept 2280 drives. · Manufacturer specification · With Ryzen 8000, M2_1 runs at PCIe 4.0 x4; M2_2 runs at PCIe 4.0 x4 with Ryzen 8700/8600/8400 and PCIe 4.0 x2 with Ryzen 8500/8300. Check the manual for M.2 heatsink restrictions.
Manufacturer specification · Onboard M.2 storage positions only. With Ryzen 8000, M2_1 runs at PCIe 4.0 x4. M2_2 runs at PCIe 4.0 x2 with Ryzen 8500/8300, or PCIe 4.0 x4 with other Ryzen 8000 CPUs. PCI_E3 runs at x2 when M2_3 is used; selecting PCI_E3 x4 in BIOS disables M2_3.
Manufacturer specification · Ryzen 8000 limits M2_1 to Gen 4 x4. M2_2 is Gen 4 x4 with 8700/8600/8400 and Gen 4 x2 with 8500/8300. Graphics lanes also depend on CPU; inspect M.2 heatsink restrictions.
All three slots are x16 length. PCI_E1 (PCIe 5.0 x16) uses CPU lanes; PCI_E2 (PCIe 3.0 x1) and PCI_E3 (PCIe 4.0 x4) use chipset lanes. · Manufacturer specification · PCI_E3 drops to x2 with M2_3 populated; selecting PCI_E3 x4 in BIOS disables M2_3. PCI_E1 runs at PCIe 4.0 x8 with Ryzen 8700/8600/8400 and PCIe 4.0 x4 with Ryzen 8500/8300.
PCI_E1 (x16 slot) uses CPU lanes; PCI_E2 (x4 slot) uses chipset lanes. · Manufacturer specification · PCI_E1 runs at PCIe 4.0 x8 with Ryzen 8700/8600/8400 and PCIe 4.0 x4 with Ryzen 8500/8300. Electrical link widths, not a guarantee of installed-system performance.
Manufacturer specification · Wi-Fi 7 requires supported Windows 11, drivers and access point; MSI specifies Windows 11 24H2 for full Wi-Fi 7 operation. 6 GHz availability depends on country rules. Bluetooth version depends on module vendor and drivers; no measured throughput is claimed.
Manufacturer specification · Wi-Fi 7 requires Windows 11 24H2, drivers and a supporting access point; 6 GHz availability depends on country rules. MSI notes the Bluetooth version depends on the Wi-Fi chipset vendor. Link capabilities are not measured throughput.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Lane-sharing restrictions
MSI MAG B850 TOMAHAWK MAX WIFINot verified
MSI MAG B850M MORTAR WIFIWith Ryzen 8000: M2_1 runs at PCIe 4.0 x4; M2_2 at PCIe 4.0 x4 (8700/8600/8400) or x2 (8500/8300); the x16 graphics slot at PCIe 4.0 x8 (8700/8600/8400) or x4 (8500/8300)
Sources
MSI MAG B850 TOMAHAWK MAX WIFI
No source recorded for this side.
MSI MAG B850M MORTAR WIFI
Ryzen 9000 and 7000 processors run both M.2 slots at PCIe 5.0 x4 and the graphics slot at PCIe 5.0 x16. MSI refers to the manual for M.2 SSD heatsink restrictions; check it for simultaneous-device configurations. · Manufacturer specification
Evidence is missing or conflicting on at least one side. This is not a verified difference.
USB port and header capacity
MSI MAG B850 TOMAHAWK MAX WIFINot verified
MSI MAG B850M MORTAR WIFI1 × USB 20 Gb/s (1 Type-C); 5 × USB 10 Gb/s (3 Type-A + 2 Type-C); 6 × USB 5 Gb/s (6 Type-A); 4 × USB 2.0
Sources
MSI MAG B850 TOMAHAWK MAX WIFI
No source recorded for this side.
MSI MAG B850M MORTAR WIFI
Manufacturer specification · Combined rear ports and internal front headers. The rear panel has the 20 Gb/s Type-C, one 10 Gb/s Type-C, three 10 Gb/s Type-A and four 5 Gb/s Type-A ports; the rest are front headers that need compatible case ports.
Manufacturer specification · Check MSI's exact CPU support list and its required BIOS. Family support does not confirm the firmware installed on a retail board.
Manufacturer specification · Check MSI's exact CPU support list and its required BIOS. Family support does not confirm the firmware installed on a retail board.
The overclocked speed is MSI's 1DPC 1R maximum with Ryzen 9000; MSI lists 1DPC 2R, 2DPC 1R and 2DPC 2R up to 6400+ MT/s. JEDEC speeds are 4800–5600 MT/s. CUDIMMs run in clock-driver bypass mode only. · Manufacturer specification · Manufacturer capacity ceiling for this exact board, not included memory or a performance measurement. CPU, BIOS, DIMM population and the validated-module list determine support. DDR5 slots require DDR5 modules; DDR4 and DDR5 are not interchangeable. CUDIMM support is bypass mode only; compatibility depends on CPU and BIOS, and some combinations may not boot. Check the exact memory support list.
The overclocked speed is MSI's 1DPC 1R maximum with Ryzen 9000; MSI lists 1DPC 2R, 2DPC 1R and 2DPC 2R up to 6400+ MT/s. JEDEC speeds are 4800–5600 MT/s. CUDIMMs run in clock-driver bypass mode only. · Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable.
4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8400+ (OC); AMD EXPO; non-ECC unbuffered; CUDIMM support
4 DDR5 DIMM slots; dual channel; up to 256 GB; up to DDR5-8200+ (OC); AMD EXPO; non-ECC unbuffered; CUDIMM support
Maximum listed memorySources
MSI MAG B850 TOMAHAWK MAX WIFI
Manufacturer specification · Manufacturer capacity ceiling for this exact board, not included memory or a performance measurement. CPU, BIOS, DIMM population and the validated-module list determine support. DDR5 slots require DDR5 modules; DDR4 and DDR5 are not interchangeable. CUDIMM support is bypass mode only; compatibility depends on CPU and BIOS, and some combinations may not boot. Check the exact memory support list.
Manufacturer specification · Physical DDR5 module positions, not included modules. Consult the board manual for population order and compatible capacities.
M2_1 and M2_2 connect to the CPU (PCIe 5.0 x4); M2_3 (PCIe 4.0 x2) and M2_4 (PCIe 4.0 x4) connect to the chipset. M2_1 accepts drives up to 22110; the others up to 2280. · Manufacturer specification · With Ryzen 8000, M2_1 runs at PCIe 4.0 x4. M2_2 runs at PCIe 4.0 x2 with Ryzen 8500/8300, or PCIe 4.0 x4 with other Ryzen 8000 CPUs. PCI_E3 runs at x2 when M2_3 is used; selecting PCI_E3 x4 in BIOS disables M2_3.
M2_1 and M2_2 connect to the CPU; M2_3 connects to the chipset. All three accept 2280 drives. · Manufacturer specification · With Ryzen 8000, M2_1 runs at PCIe 4.0 x4; M2_2 runs at PCIe 4.0 x4 with Ryzen 8700/8600/8400 and PCIe 4.0 x2 with Ryzen 8500/8300. Check the manual for M.2 heatsink restrictions.
Manufacturer specification · Onboard M.2 storage positions only. With Ryzen 8000, M2_1 runs at PCIe 4.0 x4. M2_2 runs at PCIe 4.0 x2 with Ryzen 8500/8300, or PCIe 4.0 x4 with other Ryzen 8000 CPUs. PCI_E3 runs at x2 when M2_3 is used; selecting PCI_E3 x4 in BIOS disables M2_3.
Manufacturer specification · Ryzen 8000 limits M2_1 to Gen 4 x4. M2_2 is Gen 4 x4 with 8700/8600/8400 and Gen 4 x2 with 8500/8300. Graphics lanes also depend on CPU; inspect M.2 heatsink restrictions.
Manufacturer specification · SATA 6 Gb/s connectors, not supplied drives or power cables. With Ryzen 8000, M2_1 runs at PCIe 4.0 x4. M2_2 runs at PCIe 4.0 x2 with Ryzen 8500/8300, or PCIe 4.0 x4 with other Ryzen 8000 CPUs. PCI_E3 runs at x2 when M2_3 is used; selecting PCI_E3 x4 in BIOS disables M2_3.
Manufacturer specification · Ryzen 8000 limits M2_1 to Gen 4 x4. M2_2 is Gen 4 x4 with 8700/8600/8400 and Gen 4 x2 with 8500/8300. Graphics lanes also depend on CPU; inspect M.2 heatsink restrictions.
Expansion slots and electrical linksDifferentSources
MSI MAG B850 TOMAHAWK MAX WIFI
All three slots are x16 length. PCI_E1 (PCIe 5.0 x16) uses CPU lanes; PCI_E2 (PCIe 3.0 x1) and PCI_E3 (PCIe 4.0 x4) use chipset lanes. · Manufacturer specification · PCI_E3 drops to x2 with M2_3 populated; selecting PCI_E3 x4 in BIOS disables M2_3. PCI_E1 runs at PCIe 4.0 x8 with Ryzen 8700/8600/8400 and PCIe 4.0 x4 with Ryzen 8500/8300.
PCI_E1 (x16 slot) uses CPU lanes; PCI_E2 (x4 slot) uses chipset lanes. · Manufacturer specification · PCI_E1 runs at PCIe 4.0 x8 with Ryzen 8700/8600/8400 and PCIe 4.0 x4 with Ryzen 8500/8300. Electrical link widths, not a guarantee of installed-system performance.
Ryzen 9000 and 7000 processors run both M.2 slots at PCIe 5.0 x4 and the graphics slot at PCIe 5.0 x16. MSI refers to the manual for M.2 SSD heatsink restrictions; check it for simultaneous-device configurations. · Manufacturer specification
With Ryzen 8000: M2_1 runs at PCIe 4.0 x4; M2_2 at PCIe 4.0 x4 (8700/8600/8400) or x2 (8500/8300); the x16 graphics slot at PCIe 4.0 x8 (8700/8600/8400) or x4 (8500/8300)
Graphics-slot releaseSources
MSI MAG B850 TOMAHAWK MAX WIFI
No source recorded.
MSI MAG B850M MORTAR WIFI
Manufacturer specification · An installation convenience for removing the graphics card, not a performance feature.
Manufacturer specification · Manufacturer-listed onboard audio hardware, not a measured sound-quality result. Where alternatives are listed, no particular unseen controller revision is promised.
The rear panel has an optical S/PDIF output. · Manufacturer specification · Manufacturer hardware description, not a measured audio-quality result. MSI lists up to 32-bit/384 kHz playback on the front panel.
Manufacturer specification · The only listed video output; no DisplayPort. Requires a processor with integrated graphics; supported modes depend on the CPU.
4 USB 2.0; 4 USB 5 Gb/s Type-A; 1 USB 20 Gb/s Type-C
4 USB 2.0; 2 USB 5 Gb/s Type-A; 1 USB 10 Gb/s Type-C
USB port and header capacitySources
MSI MAG B850 TOMAHAWK MAX WIFI
No source recorded.
MSI MAG B850M MORTAR WIFI
Manufacturer specification · Combined rear ports and internal front headers. The rear panel has the 20 Gb/s Type-C, one 10 Gb/s Type-C, three 10 Gb/s Type-A and four 5 Gb/s Type-A ports; the rest are front headers that need compatible case ports.
1 × USB 20 Gb/s (1 Type-C); 5 × USB 10 Gb/s (3 Type-A + 2 Type-C); 6 × USB 5 Gb/s (6 Type-A); 4 × USB 2.0
Network interfacesDifferentSources
MSI MAG B850 TOMAHAWK MAX WIFI
Manufacturer specification · Wi-Fi 7 requires supported Windows 11, drivers and access point; MSI specifies Windows 11 24H2 for full Wi-Fi 7 operation. 6 GHz availability depends on country rules. Bluetooth version depends on module vendor and drivers; no measured throughput is claimed.
Manufacturer specification · Wi-Fi 7 requires Windows 11 24H2, drivers and a supporting access point; 6 GHz availability depends on country rules. MSI notes the Bluetooth version depends on the Wi-Fi chipset vendor. Link capabilities are not measured throughput.
Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.
