MSI PRO B550M-VC WIFIAM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specification- Form factor
- Micro-ATX; 244 × 244 mmThis one: ATX; 305 × 244 mm
- SATA storage ports
- 8This one: 6
MOTHERBOARDS
MSI B550-A PRO
AM4 · ATX · DDR4 · board only
- CPU socket
- AM4
- Chipset
- AMD B550
- Form factor
- ATX; 305 × 244 mm
An ATX AM4 motherboard with AMD B550: four DDR4 slots rated up to DDR4-4800 (OC), a PCIe 4.0 x16 graphics slot, two M.2 slots (one PCIe 4.0 x4), six SATA ports and Realtek 1 Gb Ethernet.
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THE ACTUAL PRODUCT
Compare with MSI PRO B550M-VC WIFI
Specifications checked 7 Sept 2026Manufacturer specifications, not a hands-on test.
The nearest checked motherboards by key specifications, with what differs from the MSI B550-A PRO. The first matches the Compare button above.
MSI PRO B550M-VC WIFIAM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specification
MSI B550M PRO-VDH WIFIAM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specification- Form factor
- Micro-ATX; 244 × 244 mmThis one: ATX; 305 × 244 mm
- SATA storage ports
- 4This one: 6
MSI PRO B760-P WIFI DDR4LGA 1700 · DDR4 · ATX · MSI global specification- CPU socket
- LGA 1700This one: AM4
- Chipset
- Intel B760This one: AMD B550
Key strengths
Two M.2 slots (the CPU-connected M2_1 runs up to PCIe 4.0 x4) and six SATA ports.
A rear 10 Gb/s USB-C port, six system fan headers and a rear Flash BIOS button.
Before you buy
Only 1 Gb Ethernet and no Wi-Fi or Bluetooth, and a PCIe SSD in M2_2 disables PCI_E3.
Works with
Products in this catalogue that list the same socket or memory type as the MSI B550-A PRO. A shared socket or memory type is necessary but not sufficient: check the exact CPU and memory support lists, and the BIOS version, before buying.
- 7 AM4 processorsSocket AM4 on both, from cited specifications
- 8 DDR4 memory kitsMemory type DDR4 on both, from cited specifications
Every specification. With its source.
Full specifications
Exact configuration: AM4 · ATX · DDR4 · board-only configuration · MSI global specification
24 specifications in 9 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”.
Platform & board
3 items
Memory
5 items
- DIMM slots
- 4
Physical DDR4 module positions, not included modules. Consult the board manual for population order and compatible capacities.
Source - Maximum listed memory
- 128 GB
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. DDR4 slots require DDR4 modules; DDR4 and DDR5 are not interchangeable.
Source - Memory type, slots and limit
- 4 DDR4 DIMM slots; dual channel; up to 128 GB; up to DDR4-4800 (OC); A-XMP; non-ECC unbuffered
The overclocked speed is MSI's 1DPC 1R maximum (MSI's A-XMP speed list itself runs to 4400+ MHz); MSI lists 1DPC 2R up to 3866, 2DPC 1R up to 4000 and 2DPC 2R up to 3600 MHz. JEDEC speeds run up to DDR4-3200. · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable.
Source - Published memory OC configurations
- 1DPC 1R up to 4800; 1DPC 2R up to 3866; 2DPC 1R up to 4000; 2DPC 2R up to 3600
MSI labels these memory speeds in MHz (manufacturer notation); they are the rated data rates. · Manufacturer OC configurations, not guaranteed kit speed or measured application performance. CPU, BIOS, memory rank and DIMMs per channel determine support.
Source - ECC module operating mode
- ECC UDIMM supported in non-ECC mode
ECC modules run in non-ECC mode, so error correction is not active.
Source
Expansion slots
2 items
- Primary expansion-slot link
- PCI_E1: PCIe 4.0 x16
PCIe 4.0 or 3.0 depending on the installed processor; not a measured graphics performance result.
Source - Secondary expansion slots
- 1 long PCIe 3.0 slot wired x4; 2 PCIe 3.0 x1 slots
The x4-wired long slot is PCI_E3. · Installing a PCIe SSD in M2_2 makes PCI_E3 unavailable.
Source
Storage
6 items
- Onboard M.2 storage slots
- 2
Onboard M.2 storage positions only. M.2 generation depends on the CPU. Installing a PCIe SSD in M2_2 disables PCI_E3.
Source - SATA storage ports
- 6
SATA 6 Gb/s connectors, not supplied drives or power cables. M.2 generation depends on the CPU. Installing a PCIe SSD in M2_2 disables PCI_E3.
Source - Storage interfaces
- 1 × M.2 PCIe 4.0 x4; 1 × M.2 PCIe 3.0 x4; M2_1 also supports SATA; 6 × SATA 6 Gb/s
M2_1 connects to the CPU; M2_2 connects to the B550 chipset. · M2_1 runs at PCIe 4.0 or 3.0 depending on the installed processor. A PCIe SSD in M2_2 disables PCI_E3.
Source - SATA RAID modes
- RAID 0/1/10
Requires compatible drives and array configuration; no data protection guarantee.
Source - NVMe RAID modes
- RAID 0/1
Requires compatible drives and array configuration; no data protection guarantee.
Source - Expansion/storage lane sharing
- Installing a PCIe SSD in M2_2 makes PCI_E3 unavailable.
Plan storage drives and expansion cards together; this restriction applies to this board's slot wiring.
Source
USB & rear connections
3 items
- Processor-dependent display outputs
- HDMI 2.1 and DisplayPort: up to 4096×2160 at 60 Hz
Requires integrated CPU graphics; supported modes depend on processor.
Source - Rear USB ports
- 4 USB 2.0; 2 USB 5 Gb/s Type-A; 1 USB 10 Gb/s Type-A; 1 USB 10 Gb/s Type-C
Port inventory and interface ratings, not simultaneous measured throughput or charging power.
Source - Front USB header capacity
- 4 USB 2.0; 2 USB 5 Gb/s Type-A; 1 USB 5 Gb/s Type-C
Requires compatible case ports and cabling; not rear sockets.
Source
Networking
1 item
- Network interfaces
- Realtek 8111H 1 Gb Ethernet
Wired Ethernet only; MSI lists no Wi-Fi or Bluetooth hardware for this board.
Source
Audio
1 item
- Onboard audio hardware
- Realtek ALC892 or ALC897 codec; 7.1-channel
Manufacturer-listed onboard audio hardware, not a measured sound-quality result. Where alternatives are listed, no particular unseen controller revision is promised.
Source
Power, cooling & lighting
1 item
- Cooling headers
- 1 CPU; 1 pump; 6 system fan headers
Board headers, not supplied fans or an assertion of current limits.
Source
BIOS, software & diagnostics
2 items
- CPU support / BIOS source
- AMD Ryzen 5000 / 3000 Series (except Ryzen 5 3400G and Ryzen 3 3200G) and 4000 G-Series
Check MSI's exact CPU support list and its required BIOS. Family support does not confirm the firmware installed on a retail board.
Source - Rear Flash BIOS button
- Yes
Button presence only. Recovery procedure and USB preparation require the exact manual.
Source
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