MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store
MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard - AHW Store

MSI

MSI PRO B850M-A WIFI PZ DDR5 mATX Motherboard

EGP 12,100

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MSI

MSI PRO B850M-A WIFI PZ โ€” back-connect AM5 mATX with PCIe 5.0, Wi-Fi 7 and 5G LAN

An AMD B850 micro-ATX motherboard for Ryzen 9000, 8000 and 7000 Series processors, built around MSI's back-connect (PZ) design: the 24-pin, CPU power, fan and SATA connectors sit on the rear of the board, so cables disappear behind the motherboard tray. It pairs a Direct 8+2+1 phase VRM with 60A smart power stages, a PCIe 5.0 x16 slot and PCIe 5.0 M.2, four DDR5 slots rated to 8200+ MT/s (OC), Wi-Fi 7 and 5G LAN, all in a silver-white finish made for white builds.

MSI PRO B850M-A WIFI PZ retail box beside the silver-white back-connect mATX motherboard with Wi-Fi 7 and AI PC badges
SocketAMD AM5
ChipsetAMD B850
MemoryDDR5 ยท 4 DIMM
Form FactorBack-connect mATX
WirelessWi-Fi 7
01

Board Map

Every slot on the front, every cable on the back
MSI PRO B850M-A WIFI PZ top-down layout: AM5 socket, silver VRM heatsinks, four DDR5 slots, PCIe 5.0 x16 slot and M.2 Shield Frozr
1

AMD Socket AM5 โ€” Centre

Takes AMD Ryzen 9000, 8000 and 7000 Series desktop processors, with Precision Boost Overdrive presets and PBO thermal profiles in Click BIOS X.

2

Direct 8+2+1 VRM under silver heatsinks โ€” Top & Left

Eight 60A smart power stages feed Vcore directly. Extended heatsinks sit on 7W/mK MOSFET pads with extra choke pads.

3

4 ร— DDR5 DIMM slots โ€” Right

Dual-channel DDR5, up to 256 GB, rated to 8200+ MT/s (OC) with one single-rank DIMM per channel. AMD EXPO and A-XMP profiles supported.

4

PCIe 5.0 x16 slot with EZ PCIe Clip II โ€” Upper expansion

Wired to the CPU at PCIe 5.0 x16 on Ryzen 9000/7000. The one-finger clip releases long graphics cards in tight cases.

5

2 ร— M.2 NVMe from the CPU โ€” Mid board

M.2_1 at PCIe 5.0 x4 and M.2_2 at PCIe 4.0 x4, both 2280/2260, with the M.2 Shield Frozr and tool-free EZ M.2 Clip II.

6

Back-connect headers โ€” Rear of the board

24-pin, 8+4-pin CPU power, the PCIe supplemental 8-pin, fan headers and 4 ร— SATA 6Gb/s all face the back, out of sight.

02

Power Delivery & Back-Connect

What feeds the socket, and where the cables go
Underside of the MSI PRO B850M-A WIFI PZ showing the back-connect power, fan and SATA headers moved behind the board
8+2+1Direct digital phases
60A SPSVcore smart power stages
8+4-pinSolid-pin CPU power
8-pin PCIeSupplemental slot power

Direct 8+2+1 Phase VRM

Eight 60A smart power stages for Vcore, two for SoC and one for MISC, fed by solid-pin 8+4-pin connectors with load-line calibration and overvoltage protection.

Back-Connect Layout

The power, fan and SATA connectors shown on the underside here plug in from behind the motherboard tray, leaving the front of the board free of cables.

6-Layer Server-Grade PCB

Six PCB layers with 2oz thickened copper carry the current and keep high-speed DDR5 and PCIe 5.0 signals clean.

Extended Heatsinks & Combo Fan Header

7W/mK MOSFET pads, extra choke pads and an enlarged chipset heatsink, plus a combo header that auto-detects a pump or a PWM/DC fan.

03

Lane Map

Interface speed rating & capability relative to modern motherboard standards
PCIe 5.0 x16 slot (PCI_E1)Graphics card, from the CPU
~64 GB/s per direction
M.2_1 PCIe 5.0 x4Primary Gen5 NVMe SSD, from the CPU
~16 GB/s
M.2_2 PCIe 4.0 x4Second NVMe SSD, from the CPU
~8 GB/s
Wi-Fi 7 (160MHz)2.4 / 5 / 6 GHz, Bluetooth 5.4
up to 2.9 Gb/s
Realtek 8126 5G LANWired Ethernet
5 Gb/s
USB 10Gbps ร— 5 (rear)3 ร— Type-A + 2 ร— Type-C
10 Gb/s each
SATA 6Gb/s ร— 4Drives and RAID 0/1/10
6 Gb/s each
04

Rear I/O Bay

Exactly what appears on the back of your case
MSI PRO B850M-A WIFI PZ rear I/O: Flash BIOS and Clear CMOS buttons, HDMI, DisplayPort, USB 10Gbps Type-A and Type-C, 5G LAN, Wi-Fi 7 antennas and audio
Port inventoryEverything on the panel, counted โ€” not in physical order
2ร—Flash BIOS & Clear CMOS buttonsUpdate the BIOS with only the PSU connected, or reset to defaults
1ร—HDMI 2.1Up to 4K 60Hz from Ryzen integrated graphics
1ร—DisplayPort 1.4Up to 4K 60Hz from Ryzen integrated graphics
3ร—USB 10Gbps Type-A (red)One doubles as the Flash BIOS port
2ร—USB 10Gbps Type-CReversible 10 Gbps for SSDs and docks
3ร—USB 5Gbps Type-A (blue)Keyboard, mouse and everyday peripherals
1ร—5G LANRealtek 8126 5 Gbps Ethernet
2ร—Wi-Fi 7 antenna connectorsFor the included EZ Antenna, Bluetooth 5.4
3ร—Audio jacksLine-in, line-out and mic-in, Realtek ALC897 7.1-channel
05

Will It Fit Your Build?

Check these before you add to cart
!

Case โ€” needs back-connect support

This is a back-connect board: its power, fan and SATA connectors are on the rear. It needs a case with back-connect cut-outs in the motherboard tray (MSI Project Zero or a compatible design). A standard mATX case will not reach those connectors.

โœ“

Processor

AMD Ryzen 9000, 8000 and 7000 Series on socket AM5. Ryzen 8000 chips run the x16 slot and M.2_1 at PCIe 4.0.

โœ“

Memory

DDR5 only: 4 slots, up to 256 GB, 5600โ€“4800 MT/s JEDEC and up to 8200+ MT/s with EXPO overclocking.

โœ“

Graphics & Storage

One PCIe 5.0 x16 slot, one PCIe 5.0 x4 M.2, one PCIe 4.0 x4 M.2 and 4 ร— SATA.

โœ“

Networking

Wi-Fi 7 with Bluetooth 5.4 and 5G LAN built in. Wi-Fi 7 needs Windows 11 24H2.

โœ“

Size

Back-connect mATX, 24.4 ร— 24.4 cm, silver-white finish.

06

Full Specification Sheet

MSI PRO B850M-A WIFI PZ
CPU Socket AMD Socket AM5
CPU Support AMD Ryzen 9000 / 8000 / 7000 Series desktop processors
Chipset AMD B850
Form Factor Back-connect mATX, 24.38 ร— 24.38 cm
Power Design Direct 8+2+1 phases, 60A SPS, 8+4-pin CPU power
Memory 4 ร— DDR5 UDIMM, dual channel, up to 256 GB
Memory Speed 5600โ€“4800 MT/s JEDEC, up to 8200+ MT/s OC (AMD EXPO / A-XMP)
Expansion Slots PCI_E1 PCIe 5.0 x16 (CPU), PCI_E4 PCIe 4.0 x4, PCI_E2 / PCI_E3 PCIe 3.0 x1 (chipset)
M.2 Storage M.2_1 PCIe 5.0 x4, M.2_2 PCIe 4.0 x4 (both from CPU, 2280/2260)
SATA 4 ร— SATA 6Gb/s, RAID 0/1/10
Wireless Wi-Fi 7 (up to 2.9 Gbps, 6GHz) + Bluetooth 5.4
LAN Realtek 8126 5G LAN
Audio Realtek ALC897, 7.1-channel HD Audio
Rear USB 3 ร— USB 10Gbps Type-A, 2 ร— USB 10Gbps Type-C, 3 ร— USB 5Gbps Type-A
Video Outputs HDMI 2.1 and DisplayPort 1.4, each up to 4K 60Hz (integrated graphics)
Internal Headers 3 ร— ARGB V2, 1 ร— RGB, CPU fan, combo pump/fan, 3 ร— system fan, front USB-C 10Gbps, TPM 2.0
07

Technical & Policy Q&A

Common questions about this motherboard
What does PZ (back-connect) mean, and will it fit my case?+
PZ boards move the 24-pin, CPU power, fan and SATA connectors to the back of the motherboard. You need a case whose motherboard tray has back-connect cut-outs, such as MSI Project Zero cases or other back-connect compatible designs. In a standard case those connectors cannot be reached.
Do all Ryzen processors get PCIe 5.0 on this board?+
No. Ryzen 9000 and 7000 run the x16 slot and M.2_1 at PCIe 5.0. Ryzen 8700/8600/8400 run the slot at PCIe 4.0 x8 and M.2_1 at PCIe 4.0 x4; Ryzen 8500/8300 run the slot at PCIe 4.0 x4 and M.2_2 at PCIe 4.0 x2.
What do I need for Wi-Fi 7 and the 6GHz band?+
The Wi-Fi 7 module is pre-installed and supports 2.4, 5 and 6GHz at up to 2.9 Gbps. Wi-Fi 7 and Bluetooth 5.4 need Windows 11 version 24H2, and 6GHz availability depends on local regulations.
Does AHW Store update the BIOS before shipping?+
Every motherboard ships sealed in its original retail packaging with the factory BIOS. Our engineers can flash the latest vendor BIOS free of charge on request when you order a CPU with the board, which guarantees first-boot compatibility with the newest supported CPU generation.
What warranty coverage is included?+
All motherboards sold at AHW Store carry the official authorized distributor warranty with local technical support and replacement. Full terms in our Warranty Policy โ†—.
What payment and installment plans are available in Egypt?+
We accept Cash on Delivery (COD) across Egypt, Visa and Mastercard cards, Meeza and mobile wallets, 0% interest 6-month installments with our partner banks, and longer installment plans through ValU, Forsa, Halan, Seven, Klivvr and mylo. See our Payment & Installments Guide โ†—.
How fast is shipping across Egypt?+
Orders are delivered within 2 to 7 business days across all Egyptian governorates, packed in anti-static shielding with shock-protected outer packaging (with pickup available from our 6th of October headquarters). See our Shipping Policy โ†—.
Can AHW Store build the complete PC around this motherboard?+
Yes. Our certified engineers assemble, cable-manage, flash BIOS, stress-test and tune the finished system before it ships. Start with our Custom PC Builder โ†—.

Shop the range: AMD B850 Motherboards

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