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.
Amazon links open search results. Check the exact variant, current price and availability with the retailer.
Manufacturer specifications5 verified differences, led by Form factor, memory type, slots and limit and storage interfaces. Compared in full below. Not a rating.
UK manufacturer specification · Pro A520M-C/CSM
Pro A520M-C/CSM motherboard, identified in the ASUS UK catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.
Specifications checked 17 Oct 2026.
Amazon links open search results. Check the exact variant, current price and availability with the retailer.
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Differences first. Select a topic for its graphic, sources and conditions.
Check the exact configuration and source conditions for your use.
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.
5 verified differences, most decision-relevant first. All are also drawn in Visual facts above. Missing information stays separate.
Manufacturer specification · Board dimensions, not retail packaging. Check case mounting positions, clearance and cable routing.
MSI A520M-A PRO — manufacturer specificationsManufacturer specification
ASUS Pro A520M-C/CSM — official UK technical specificationsCheck the exact configuration and source conditions for your use.
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 specificationsManufacturer specification
ASUS Pro A520M-C/CSM — official UK technical 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 specificationsManufacturer specification
ASUS Pro A520M-C/CSM — official UK technical 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
ASUS Pro A520M-C/CSM — official UK technical specificationsCheck the exact configuration and source conditions for your use.
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 specificationsManufacturer specification
ASUS Pro A520M-C/CSM — official UK technical specificationsCheck the exact configuration and source conditions for your use.
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 · Exact CPU support and BIOS revision depend on the processor and the current ASUS CPU support list; the family statement is not a guarantee for every processor.
ASUS Pro A520M-C/CSM — official UK technical specificationsThese descriptions or measurements differ. Wording alone does not establish a different capability; check the exact configuration.
Manufacturer specification · Physical DDR4 module positions, not included modules. Consult the board manual for population order and compatible capacities.
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.
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 specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
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 specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
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 specificationsNo source recorded for this side.
Evidence 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.
No source recorded for this side.
Manufacturer specification
ASUS Pro A520M-C/CSM — official UK technical specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Counts do not establish connector current limits.
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.
Manufacturer specification · Requires a processor with integrated graphics; supported modes depend on the CPU.
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 specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification
ASUS Pro A520M-C/CSM — official UK technical specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
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 specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
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 specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Internal-header capacity; requires compatible case ports and wiring. Not rear-panel sockets.
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.
Manufacturer specification · The detailed specification identifies the two rear USB 2.0 ports as Type-A.
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.
2 shared fields have the same recorded value.
| Specification | MSI A520M-A PRO | ASUS Pro A520M-C/CSM |
|---|---|---|
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 specificationsASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | AM4 | AM4 |
Chipset SourcesASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | AMD A520 | AMD A520 |
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 specificationsASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | Micro-ATX; 236 × 200 mm | 9.6 inch x 9.0 inch ( 24.4 cm x 22.9 cm ),mATX Form Factor |
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 specificationsASUS Pro A520M-C/CSM Manufacturer specification · Exact CPU support and BIOS revision depend on the processor and the current ASUS CPU support list; the family statement is not a guarantee for every processor. ASUS Pro A520M-C/CSM — official UK technical specifications | AMD Ryzen 5000 / 5000 G-Series / 4000 G-Series / 3000 / 3000 G-Series | * Refer to https://www.asus.com for CPU support list.,AMD AM4 Socket for 3rd Gen AMD Ryzen™ and 3rd Gen AMD Ryzen™ with Radeon™ Graphics Processors * BIOS: 256 Mb Flash ROM, UEFI AMI BIOS |
Listed operating systems SourcesMSI A520M-A PRO No source recorded. ASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | Not provided | Windows® 10 64-bit |
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 specificationsASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | 2 DDR4 DIMM slots; dual channel; up to 64 GB; up to DDR4-4600+ (OC); A-XMP; non-ECC unbuffered | * Refer to https://www.asus.com for the Memory QVL (Qualified Vendors Lists).,2 x DIMM, Max. 64GB, DDR4 4600(O.C)/4400(O.C)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory *,* The maximum memory frequency supported varies by processor.,Dual Channel Memory Architecture,ECC Memory (ECC mode) support varies by CPU. |
Maximum listed memory 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 specificationsASUS Pro A520M-C/CSM No source recorded. | 64 GB | Not provided |
DIMM slots 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 specificationsASUS Pro A520M-C/CSM No source recorded. | 2 | Not provided |
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 specificationsASUS Pro A520M-C/CSM 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 specificationsASUS Pro A520M-C/CSM 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 specificationsASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | 1 × M.2 PCIe 3.0 x4; M.2 slot also supports SATA; 4 × SATA 6 Gb/s | 3rd Gen AMD Ryzen™ and 3rd Gen AMD Ryzen™ with Radeon™ Graphics Processors:,AMD A520 Chipset:,Total supports 1 x M.2 slot(s) and 4 x SATA 6Gb/s ports,1 x M.2 Socket 3, with M Key, Type 2242/2260/2280 (PCIE 3.0 x4 and SATA modes) storage devices support,4 x SATA 6Gb/s port(s),,Support Raid 0, 1, 10 |
Onboard M.2 storage slots 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 specificationsASUS Pro A520M-C/CSM No source recorded. | 1 | Not provided |
SATA storage ports 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 specificationsASUS Pro A520M-C/CSM No source recorded. | 4 | Not provided |
SATA RAID modes SourcesASUS Pro A520M-C/CSM No source recorded. | RAID 0/1/10 | Not provided |
Primary PCIe link 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 specificationsASUS Pro A520M-C/CSM No source recorded. | x16 slot: CPU PCIe 3.0 up to x16 | Not provided |
Secondary expansion links SourcesASUS Pro A520M-C/CSM No source recorded. | 1 PCIe 3.0 x1 slot | Not provided |
Expansion slots and restrictions SourcesMSI A520M-A PRO No source recorded. ASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | Not provided | 3rd Gen AMD Ryzen™ and 3rd Gen AMD Ryzen™ with Radeon™ Graphics Processors,AMD A520 Chipset,2 x PCIe 3.0 x1,1 x PCI,1 x PCIe 3.0 x16 (x16 mode) |
Onboard audio hardwareDifferent 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 specificationsASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | Realtek ALC892 or ALC897 codec; 7.1-channel | Realtek ALC8877.1 Surround Sound High Definition Audio CODEC *,- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking, up to 24-Bit/192kHz playback,* Choose the chassis with HD audio module in front panel to support 8-channel audio output. |
Processor-dependent display outputs SourcesMSI A520M-A PRO Manufacturer specification · Requires a processor with integrated graphics; supported modes depend on the CPU. MSI A520M-A PRO — manufacturer specificationsASUS Pro A520M-C/CSM No source recorded. | HDMI 2.1: up to 4096×2160 at 60 Hz; DVI-D: up to 1920×1200 at 60 Hz | Not provided |
Rear USB ports 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 specificationsASUS Pro A520M-C/CSM No source recorded. | 2 USB 2.0; 4 USB 5 Gb/s Type-A | Not provided |
Front USB header capacity SourcesMSI A520M-A PRO Manufacturer specification · Internal-header capacity; requires compatible case ports and wiring. Not rear-panel sockets. MSI A520M-A PRO — manufacturer specificationsASUS Pro A520M-C/CSM No source recorded. | 4 USB 2.0; 2 USB 5 Gb/s | Not provided |
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 specificationsASUS Pro A520M-C/CSM Manufacturer specification ASUS Pro A520M-C/CSM — official UK technical specifications | Realtek 8111H 1 Gb Ethernet | Realtek RTL8111H 1Gb Ethernet,ASUS LANGuard |
Fan and pump headers SourcesMSI A520M-A PRO Manufacturer specification · Counts do not establish connector current limits. MSI A520M-A PRO — manufacturer specificationsASUS Pro A520M-C/CSM No source recorded. | 1 CPU; 1 system fan header | Not provided |
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 datasheetASUS Pro A520M-C/CSM No source recorded. | EZ Debug LED | Not provided |
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 specificationsASUS Pro A520M-C/CSM No source recorded. | Not provided | Not provided |
|---|---|---|
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 specificationsASUS Pro A520M-C/CSM No source recorded. | Not provided | 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.
