AM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specification
A compact Micro-ATX AM4 motherboard with AMD A520: two DDR4 slots (up to 64 GB, DDR4-4600+ OC), a PCIe 3.0 x16 graphics slot, one M.2 slot and Realtek 1 Gb Ethernet.
Specifications checked 21 Sept 2026.
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Manufacturer specificationsAM4 · Micro-ATX · DDR4 · board-only configuration · MSI global specification
A Micro-ATX AM4 motherboard with AMD B550: four DDR4 slots rated up to DDR4-4400+ (OC), a PCIe 4.0 x16 graphics slot, two M.2 slots (one PCIe 4.0 x4), eight SATA ports and AMD Wi-Fi 6E with Bluetooth 5.2.
Specifications checked 21 Sept 2026.
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Differences first. Select a topic for its graphic, sources and conditions.
Different hardware. A chip name or generation does not quantify real-world performance.
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.
14 verified differences, most decision-relevant first. 7 are also drawn in Visual facts above. Missing information stays separate.
Different hardware. A chip name or generation does not quantify real-world performance.
The overclocked speed is MSI's 1DPC 1R maximum; MSI lists 1DPC 2R up to 3866 MHz. JEDEC speeds run up to DDR4-3200. · Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable.
MSI A520M-A PRO — manufacturer specificationsThe overclocked speed is MSI's 1DPC 1R maximum; MSI lists 1DPC 2R up to 3733, 2DPC 1R up to 3866 and 2DPC 2R up to 3466 MHz. JEDEC speeds run up to DDR4-3200. · Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Physical DDR4 module positions, not included modules. Consult the board manual for population order and compatible capacities.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Physical DDR4 module positions, not included modules. Consult the board manual for population order and compatible capacities.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
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. DDR4 slots require DDR4 modules; DDR4 and DDR5 are not interchangeable.
MSI A520M-A PRO — manufacturer specificationsManufacturer 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. DDR4 slots require DDR4 modules; DDR4 and DDR5 are not interchangeable.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
The M.2 slot connects to the CPU. · Manufacturer specification · With Athlon processors with Radeon Vega Graphics the M.2 slot works in SATA mode only. It accepts 2242/2260/2280 drives.
MSI A520M-A PRO — manufacturer specificationsM2_1 connects to the CPU; M2_2 connects to the B550 chipset. Four SATA ports come from the B550 chipset and four from an ASMedia ASM1064 controller. · Manufacturer specification · M2_1 runs at PCIe 4.0 or 3.0 depending on the installed processor. Both M.2 slots accept 2242/2260/2280 drives.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Onboard M.2 storage positions only. With Athlon processors with Radeon Vega Graphics, MSI lists SATA mode only for M.2. Supported M.2 lengths are 2242/2260/2280; verify the exact processor support list.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Onboard M.2 storage positions only. M.2 PCIe generation depends on the installed CPU. Both M.2 slots accept 2242/2260/2280 drives. Four SATA ports come from B550 and four from ASM1064.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Physical connector length and electrical lane count differ.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Wired Ethernet only; MSI lists no Wi-Fi or Bluetooth hardware for this board.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · 6 GHz availability depends on country rules, operating system and drivers. Link capabilities are not measured throughput.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Counts do not establish connector current limits.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · No included fans or current limits inferred.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Requires a processor with integrated graphics; supported modes depend on the CPU.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Requires integrated processor graphics; CPU-dependent modes.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · x16 with Ryzen 5000/5000G/4000G/3000; x8 with Ryzen 3000G; x4 with Athlon with Radeon Graphics processors. Check the CPU support list for the exact processor.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · PCIe 4.0 or 3.0 depending on the installed processor; not a measured graphics performance result.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · SATA 6 Gb/s connectors, not supplied drives or power cables. With Athlon processors with Radeon Vega Graphics, MSI lists SATA mode only for M.2. Supported M.2 lengths are 2242/2260/2280; verify the exact processor support list.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · SATA 6 Gb/s connectors, not supplied drives or power cables. M.2 PCIe generation depends on the installed CPU. Both M.2 slots accept 2242/2260/2280 drives. Four SATA ports come from B550 and four from ASM1064.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Internal-header capacity; requires compatible case ports and wiring. Not rear-panel sockets.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Requires case ports and cables; not rear sockets.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · The detailed specification identifies the two rear USB 2.0 ports as Type-A.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Interface limits, not measured aggregate throughput.
MSI PRO B550M-VC WIFI — manufacturer specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Board dimensions, not retail packaging. Check case mounting positions, clearance and cable routing.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Board dimensions, not retail packaging. Check case mounting positions, clearance and cable routing.
MSI PRO B550M-VC WIFI — manufacturer specificationsThese descriptions or measurements differ. Wording alone does not establish a different capability; check the exact configuration.
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.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Check MSI's exact CPU support list and its required BIOS. Family support does not confirm the firmware installed on a retail board.
MSI PRO B550M-VC WIFI — manufacturer specificationsMSI PRO B550M-VC WIFI — exact model datasheetThese descriptions or measurements differ. Wording alone does not establish a different capability; check the exact configuration.
MSI's rear-panel list for this board does not mention a Flash BIOS button; check the manual if you need BIOS flashback. · Manufacturer specification
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Recovery procedure and USB preparation require the manual.
MSI PRO B550M-VC WIFI — manufacturer specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · MSI's datasheet lists EZ Debug LED without the LED count; it is not a numeric POST code display.
MSI A520M-A PRO — exact model datasheetNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · ECC modules run in non-ECC mode, so error correction is not active.
MSI A520M-A PRO — manufacturer specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
MSI labels these memory speeds in MHz (manufacturer notation); they are the rated data rates. · Manufacturer specification · Manufacturer A-XMP/OC limits, not guaranteed stability or measured performance. CPU, BIOS and memory-module compatibility apply.
MSI A520M-A PRO — manufacturer specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
MSI lists RAID modes for SATA drives only; NVMe RAID support is not stated. · Manufacturer specification
MSI A520M-A PRO — manufacturer specificationsManufacturer specification · Requires compatible drives and array configuration.
MSI PRO B550M-VC WIFI — manufacturer specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
3 shared fields have the same recorded value.
| Specification | MSI A520M-A PRO | MSI PRO B550M-VC WIFI |
|---|---|---|
CPU socket SourcesMSI A520M-A PRO Manufacturer specification · Match the exact CPU and required BIOS as well as the physical socket. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Match the exact CPU and required BIOS as well as the physical socket. MSI PRO B550M-VC WIFI — manufacturer specifications | AM4 | AM4 |
ChipsetDifferent Sources | AMD A520 | AMD B550 |
Form factorDifferent SourcesMSI A520M-A PRO Manufacturer specification · Board dimensions, not retail packaging. Check case mounting positions, clearance and cable routing. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Board dimensions, not retail packaging. Check case mounting positions, clearance and cable routing. MSI PRO B550M-VC WIFI — manufacturer specifications | Micro-ATX; 236 × 200 mm | Micro-ATX; 244 × 244 mm |
CPU support / BIOS sourceDifferent SourcesMSI A520M-A PRO 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. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI 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. MSI PRO B550M-VC WIFI — manufacturer specificationsMSI PRO B550M-VC WIFI — exact model datasheet | AMD Ryzen 5000 / 5000 G-Series / 4000 G-Series / 3000 / 3000 G-Series | AMD Ryzen 5000 / 5000 G-Series / 4000 G-Series / 3000 Series |
Rear Flash BIOS button SourcesMSI A520M-A PRO MSI's rear-panel list for this board does not mention a Flash BIOS button; check the manual if you need BIOS flashback. · Manufacturer specification MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Recovery procedure and USB preparation require the manual. MSI PRO B550M-VC WIFI — manufacturer specifications | Not provided | Yes |
Memory type, slots and limitDifferent SourcesMSI A520M-A PRO The overclocked speed is MSI's 1DPC 1R maximum; MSI lists 1DPC 2R up to 3866 MHz. JEDEC speeds run up to DDR4-3200. · Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI The overclocked speed is MSI's 1DPC 1R maximum; MSI lists 1DPC 2R up to 3733, 2DPC 1R up to 3866 and 2DPC 2R up to 3466 MHz. JEDEC speeds run up to DDR4-3200. · Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable. MSI PRO B550M-VC WIFI — manufacturer specifications | 2 DDR4 DIMM slots; dual channel; up to 64 GB; up to DDR4-4600+ (OC); A-XMP; non-ECC unbuffered | 4 DDR4 DIMM slots; dual channel; up to 128 GB; up to DDR4-4400+ (OC); A-XMP; non-ECC unbuffered |
Maximum listed memoryDifferent SourcesMSI A520M-A PRO 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. DDR4 slots require DDR4 modules; DDR4 and DDR5 are not interchangeable. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC 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. DDR4 slots require DDR4 modules; DDR4 and DDR5 are not interchangeable. MSI PRO B550M-VC WIFI — manufacturer specifications | 64 GB | 128 GB |
DIMM slotsDifferent SourcesMSI A520M-A PRO Manufacturer specification · Physical DDR4 module positions, not included modules. Consult the board manual for population order and compatible capacities. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Physical DDR4 module positions, not included modules. Consult the board manual for population order and compatible capacities. MSI PRO B550M-VC WIFI — manufacturer specifications | 2 | 4 |
Memory population OC limits SourcesMSI A520M-A PRO MSI labels these memory speeds in MHz (manufacturer notation); they are the rated data rates. · Manufacturer specification · Manufacturer A-XMP/OC limits, not guaranteed stability or measured performance. CPU, BIOS and memory-module compatibility apply. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI No source recorded. | 1DPC 1R: 4600 MHz; 1DPC 2R: 3866 MHz | Not provided |
ECC memory operating mode SourcesMSI A520M-A PRO Manufacturer specification · ECC modules run in non-ECC mode, so error correction is not active. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI No source recorded. | ECC UDIMM accepted in non-ECC mode | Not provided |
Storage interfacesDifferent SourcesMSI A520M-A PRO The M.2 slot connects to the CPU. · Manufacturer specification · With Athlon processors with Radeon Vega Graphics the M.2 slot works in SATA mode only. It accepts 2242/2260/2280 drives. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI M2_1 connects to the CPU; M2_2 connects to the B550 chipset. Four SATA ports come from the B550 chipset and four from an ASMedia ASM1064 controller. · Manufacturer specification · M2_1 runs at PCIe 4.0 or 3.0 depending on the installed processor. Both M.2 slots accept 2242/2260/2280 drives. MSI PRO B550M-VC WIFI — manufacturer specifications | 1 × M.2 PCIe 3.0 x4; M.2 slot also supports SATA; 4 × SATA 6 Gb/s | 1 × M.2 PCIe 4.0 x4; 1 × M.2 PCIe 3.0 x4; M2_1 also supports SATA; 8 × SATA 6 Gb/s |
Onboard M.2 storage slotsDifferent SourcesMSI A520M-A PRO Manufacturer specification · Onboard M.2 storage positions only. With Athlon processors with Radeon Vega Graphics, MSI lists SATA mode only for M.2. Supported M.2 lengths are 2242/2260/2280; verify the exact processor support list. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Onboard M.2 storage positions only. M.2 PCIe generation depends on the installed CPU. Both M.2 slots accept 2242/2260/2280 drives. Four SATA ports come from B550 and four from ASM1064. MSI PRO B550M-VC WIFI — manufacturer specifications | 1 | 2 |
SATA storage portsDifferent SourcesMSI A520M-A PRO Manufacturer specification · SATA 6 Gb/s connectors, not supplied drives or power cables. With Athlon processors with Radeon Vega Graphics, MSI lists SATA mode only for M.2. Supported M.2 lengths are 2242/2260/2280; verify the exact processor support list. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · SATA 6 Gb/s connectors, not supplied drives or power cables. M.2 PCIe generation depends on the installed CPU. Both M.2 slots accept 2242/2260/2280 drives. Four SATA ports come from B550 and four from ASM1064. MSI PRO B550M-VC WIFI — manufacturer specifications | 4 | 8 |
SATA RAID modes SourcesMSI PRO B550M-VC WIFI Manufacturer specification · Requires array configuration. No cross-controller array support inferred. MSI PRO B550M-VC WIFI — manufacturer specifications | RAID 0/1/10 | RAID 0/1/10 |
NVMe RAID modes SourcesMSI A520M-A PRO MSI lists RAID modes for SATA drives only; NVMe RAID support is not stated. · Manufacturer specification MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Requires compatible drives and array configuration. MSI PRO B550M-VC WIFI — manufacturer specifications | Not provided | RAID 0/1 |
Primary PCIe linkDifferent SourcesMSI A520M-A PRO Manufacturer specification · x16 with Ryzen 5000/5000G/4000G/3000; x8 with Ryzen 3000G; x4 with Athlon with Radeon Graphics processors. Check the CPU support list for the exact processor. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · PCIe 4.0 or 3.0 depending on the installed processor; not a measured graphics performance result. MSI PRO B550M-VC WIFI — manufacturer specifications | x16 slot: CPU PCIe 3.0 up to x16 | PCI_E1: PCIe 4.0 x16 |
Secondary expansion linksDifferent SourcesMSI PRO B550M-VC WIFI Manufacturer specification · Physical connector length and electrical lane count differ. MSI PRO B550M-VC WIFI — manufacturer specifications | 1 PCIe 3.0 x1 slot | 3 long PCIe 3.0 slots wired x1 |
Onboard audio hardware SourcesMSI A520M-A PRO Manufacturer specification · Manufacturer-listed onboard audio hardware, not a measured sound-quality result. Where alternatives are listed, no particular unseen controller revision is promised. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Manufacturer-listed onboard audio hardware, not a measured sound-quality result. Where alternatives are listed, no particular unseen controller revision is promised. MSI PRO B550M-VC WIFI — manufacturer specifications | Realtek ALC892 or ALC897 codec; 7.1-channel | Realtek ALC892 or ALC897 codec; 7.1-channel |
Processor-dependent display outputsDifferent SourcesMSI A520M-A PRO Manufacturer specification · Requires a processor with integrated graphics; supported modes depend on the CPU. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Requires integrated processor graphics; CPU-dependent modes. MSI PRO B550M-VC WIFI — manufacturer specifications | HDMI 2.1: up to 4096×2160 at 60 Hz; DVI-D: up to 1920×1200 at 60 Hz | VGA; DisplayPort 4096×2160 at 60 Hz; HDMI 2.1 4096×2160 at 60 Hz |
Rear USB portsDifferent SourcesMSI A520M-A PRO Manufacturer specification · The detailed specification identifies the two rear USB 2.0 ports as Type-A. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Interface limits, not measured aggregate throughput. MSI PRO B550M-VC WIFI — manufacturer specifications | 2 USB 2.0; 4 USB 5 Gb/s Type-A | 2 USB 2.0; 2 USB 5 Gb/s Type-A; 2 USB 10 Gb/s Type-A |
Front USB header capacityDifferent SourcesMSI A520M-A PRO Manufacturer specification · Internal-header capacity; requires compatible case ports and wiring. Not rear-panel sockets. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · Requires case ports and cables; not rear sockets. MSI PRO B550M-VC WIFI — manufacturer specifications | 4 USB 2.0; 2 USB 5 Gb/s | 4 USB 2.0; 2 USB 5 Gb/s Type-A; 1 USB 5 Gb/s Type-C |
Network interfacesDifferent SourcesMSI A520M-A PRO Manufacturer specification · Wired Ethernet only; MSI lists no Wi-Fi or Bluetooth hardware for this board. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · 6 GHz availability depends on country rules, operating system and drivers. Link capabilities are not measured throughput. MSI PRO B550M-VC WIFI — manufacturer specifications | Realtek 8111H 1 Gb Ethernet | Realtek 8111GN or 8111HN 1 Gb Ethernet; AMD Wi-Fi 6E; Bluetooth 5.2 |
Fan and pump headersDifferent SourcesMSI A520M-A PRO Manufacturer specification · Counts do not establish connector current limits. MSI A520M-A PRO — manufacturer specificationsMSI PRO B550M-VC WIFI Manufacturer specification · No included fans or current limits inferred. MSI PRO B550M-VC WIFI — manufacturer specifications | 1 CPU; 1 system fan header | 1 CPU; 1 pump; 3 system fan headers |
Diagnostic indicators SourcesMSI A520M-A PRO Manufacturer specification · MSI's datasheet lists EZ Debug LED without the LED count; it is not a numeric POST code display. MSI A520M-A PRO — exact model datasheetMSI PRO B550M-VC WIFI No source recorded. | EZ Debug LED | Not provided |
Closest motherboards to this pair by shared key specifications. Not a popularity ranking.
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.
