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Micro-ATX board with rear-mounted connectors and black heatsinks

MSI

MSI B650M PROJECT ZERO AMD motherboard

SKU CH-303Y-90TGM MPN B650M PROJECT ZERO

AM5 micro-ATX board with back-connect design, four DDR5 slots up to 128 GB, dual PCIe 4.0 M.2, 2.5 Gb LAN, Wi-Fi 6E and Bluetooth 5.3

  • CPU Socket TypeAM5
  • CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B650
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardMemory Support DDR5 7600+(OC)/ 7400(OC)/ 7200(OC)/ 7000(OC)/
  • Maximum Memory Supported128GB

Option B650M PROJECT ZERO

  • Back-connect layout clears the front for easier cable routing
  • Supports Ryzen 7000, 8000 and 9000 series processors on AM5
  • DDR5 memory up to 7600 MHz overclocked with AMD EXPO profiles
  • Two M.2 slots each wired for PCIe 4.0 x4 from the CPU
  • Wi-Fi 6E and Bluetooth 5.3 built in with 2.5 Gbps LAN

Back-Connect mATX Board for Ryzen AM5

The MSI B650M PROJECT ZERO is a Micro-ATX motherboard built for AMD Ryzen 7000, 8000 and 9000 series processors on the AM5 socket. Its defining feature moves power, fan and header connectors to the rear of the PCB, giving a clean front view and simpler cable routing. The board uses the AMD B650 chipset and requires a compatible back-connect case.

Installation Notes and Common Issues

The back-connect layout changes where cables attach, so builders must follow the manual closely to avoid missed connections. A BIOS update may be required before installing a Ryzen 9000 series CPU. Four DDR5 slots support up to 128 GB with AMD EXPO profiles. The pre-installed Wi-Fi 6E module occupies the M.2 Key-E slot.

Deciding Specification — Back-Connect Form Factor

This board only fits cases designed for the back-connect Micro-ATX standard. If your case uses traditional front-mounted headers, the connectors will not reach. Verify case compatibility before purchase.

Highlights

  • Back-connect layout clears the front for easier cable routing
  • Supports Ryzen 7000, 8000 and 9000 series processors on AM5
  • DDR5 memory up to 7600 MHz overclocked with AMD EXPO profiles
  • Two M.2 slots each wired for PCIe 4.0 x4 from the CPU
  • Wi-Fi 6E and Bluetooth 5.3 built in with 2.5 Gbps LAN

Specifications

BrandMSI
ModelB650M PROJECT ZERO
CPU Socket TypeAM5
CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
ChipsetAMD B650
Number of Memory Slots4x288pin (DDR5)
Memory StandardMemory Support DDR5 7600+(OC)/ 7400(OC)/ 7200(OC)/ 7000(OC)/ 6800(OC)/ 6600(OC)/ 6400(OC)/ 6200(OC)/ 6000(OC)/ 5800(OC)/ 5600(OC)/ 5400(OC)/ 5200(OC)/ 5000(OC)/ 4800(JEDEC) MHz
Max. overclocking frequency:
- 1DPC 1R Max speed up to 7600+ MHz
- 1DPC 2R Max speed up to 6400+ MHz
- 2DPC 1R Max speed up to 6400+ MHz
- 2DPC 2R Max speed up to 5400+ MHz
Maximum Memory Supported128GB
Memory Performance ProfileAMD EXPO
PCI Express 4.0 x161x PCI-E x16 slot
PCI_E1 Gen PCIe 4.0 supports up to x16 (From CPU)
PCI Express x11x PCI-E x1 slot
PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)
Serial ATA (SATA)4 x SATA 6Gb/s
M.22x M.2
M.2_1 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
M.2_2 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
SATA RAIDSupports RAID 0, RAID 1, and RAID 10 for SATA storage devices*
Supports RAID 0 and RAID 1 for M.2 NVMe storage devices
* SATA_A1_A2 do not support RAID function.
Audio ChipsetRealtek ALC897 Codec
7.1-Channel High Definition Audio
Supports S/PDIF output
Supports up to 32-Bit/384 kHz playback on front panel
Audio Channels7.1 Channels
LAN ChipsetRealtek RTL8125BG 2.5Gbps LAN
Max LAN Speed2.5Gbps
Wireless LANAMD Wi-Fi 6E
The Wireless module is pre-installed in the M.2 (Key-E) slot
Supports MU-MIMO TX/RX
Supports 20MHz, 40MHz, 80MHz bandwidth in 2.4GHz/ 5GHz or 6GHz* bands
Supports 802.11 a/ b/ g/ n/ ac/ ax
* Wi-Fi 6E 6GHz may depend on every country’s regulations and will be ready in Windows 11.
BluetoothSupports Bluetooth 5.3**
** Bluetooth 5.3 will be ready in Windows 10 build 21H1 and Windows 11.
Back I/O Ports1 x DisplayPort
1 x HDMI
1 x 2.5G LAN
2 x USB 2.0
2 x USB 3.2 Gen 1 5Gbps (Type-A)
3 x USB 3.2 Gen 2 10Gbps (Type-A)
1 x USB 3.2 Gen 2 10Gbps (Type-C)
1 x USB 3.2 Gen 2x2 20Gbps (Type-C)
2 x Wi-Fi / Bluetooth Antenna Bracket
3 x Audio connectors
1 x Flash BIOS Button
1 x Clear CMOS Button
Onboard USB4x USB 2.0 ports
2x USB 3.2 Gen1 Type A ports
1x USB 3.2 Gen2 Type C ports
Other Connectors1x CPU Fan
1x Pump Fan
3x System Fan
2x Front Panel (JFP)
1x Chassis Intrusion (JCI)
1x Front Audio (JAUD)
3x Addressable V2 RGB LED connector (JARGB_V2)
1x TPM pin header(Support TPM 2.0)
Form FactorMicro ATX (Back Connect)
Dimensions (W x L)9.6" x 9.6"
Power Pin1x Power Connector(ATX_PWR)
2x Power Connector(CPU_PWR)
Windows 11Supported
FeaturesSupports AMD Ryzen™ 7000 Series Desktop Processors
Supports DDR5 Memory, up to 7600+(OC) MHz
Premium Thermal Solution: Extended Heatsink Design and M.2 Shield Frozr are built for high performance system and non-stop works
2.5G LAN and AMD Wi-Fi 6E Solution: Upgraded network solution for professional and multimedia use. Delivers a secure, stable and fast network connection
Lightning M.2: Running at PCIe Gen 4 maximizes performance for NVMe based SSDs
Lightning USB 20G: Built-in USB 3.2 Gen 2x2 port, offers 20Gbps transmission speed, 4X faster than USB 3.2 Gen 1
Audio Boost: Reward you
Shipping weight1.57 kg
Package size279 × 272 × 79 mm

Other versions of this model

1 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How can I verify the board is running my Ryzen 7000 CPU and DDR5 memory at the intended speeds after assembly?

Enter the BIOS and confirm the CPU model is detected and the memory shows the EXPO profile active at the rated frequency such as 6000 or 7600 MHz.

What connectors and accessories are included in the box and what must I source separately for a complete build?

The box contains the motherboard with the Wi-Fi 6E module pre-installed in the Key-E M.2 slot, I/O shield, SATA cables and manuals; you must buy a compatible back-connect Micro-ATX case, DDR5 modules, an AM5 CPU cooler, graphics card, storage drives and power supply.

Which memory kit capacity should I choose given the four slots and 128 GB maximum?

For 128 GB total populate all four slots with 32 GB modules; for 64 GB use either two 32 GB sticks or four 16 GB sticks; 32 GB kits work with two 16 GB modules leaving room to expand later.

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