ASUS PRIME A520M-A II/CSM micro ATX motherboard
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About This Item
- Micro ATX motherboard with AMD A520 chipset supporting Ryzen AM4 processors
- Supports up to 128GB DDR4 memory across 4 DIMM slots with dual-channel architecture
- Features M.2 slot for NVMe storage and 4 SATA III connectors for traditional drives
- Includes 7.1 channel audio with Realtek ALC887/ALC897 codec and Gigabit Ethernet connectivity
- Offers 4 USB 3.2 Gen 1 ports, HDMI, DisplayPort, and VGA video outputs
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ASUS PRIME A520M-A II/CSM | Micro ATX AMD Ryzen Motherboard
The ASUS PRIME A520M-A II/CSM AMD A520 Socket AM4 micro ATX motherboard delivers enterprise-grade stability in a compact form factor, engineered for AMD Ryzen 3 and 5 processors with support for up to 128 GB DDR4 memory across four DIMM slots.
Slim Specs Table:
| Metric | Spec |
|---|---|
| Processor Socket | AM4 |
| Memory Support | DDR4, 128 GB max |
| Storage | M.2, SATA III |
| Expansion Slots | PCIe 3.0 x16, PCIe 3.0 x1 x2 |
| USB Ports | 4x USB 3.2 Gen 1 Type-A, 2x USB 2.0 |
Compact Design, Enterprise Reliability
Built on the AMD A520 chipset, this micro ATX board offers the perfect balance of size and capability for home office builds, small form factor systems, or business deployments. The Corporate Stable Model (CSM) designation ensures 36-month lifecycle support, making it ideal for organisations requiring long-term hardware stability without frequent upgrades.
Built for AMD Ryzen Performance
Supporting AMD Ryzen 3 and 5 series processors, the A520M-A II/CSM provides robust power delivery through its VRM heatsink design. The dual-channel DDR4 memory architecture supports speeds up to 4800 MHz, allowing smooth multitasking and responsive application performance. With four DIMM slots, you can start with minimal memory and expand later as needs grow.
Comprehensive Storage Options
Storage flexibility comes standard with this motherboard. You get one M.2 slot supporting NVMe SSDs for ultra-fast boot and load times, plus four SATA III ports for traditional hard drives or additional SSDs. The board supports RAID 0, 1, and 10 configurations, giving you options for either maximum speed or data redundancy depending on your requirements.
Cooling Solutions for Demanding Workloads
Effective thermal management ensures stable operation under sustained loads. The VRM heatsink with thermal pad provides direct heat transfer from critical components, while two chassis fan headers offer configurable cooling profiles. Whether you’re running productivity software, light creative applications, or maintaining 24/7 operation, the cooling system keeps temperatures in check.
Connectivity That Covers All Bases
The rear I/O panel provides extensive connectivity options including HDMI and DisplayPort for multi-monitor setups, VGA for legacy displays, and Gigabit Ethernet for reliable wired networking. Four USB 3.2 Gen 1 ports deliver fast data transfer speeds for peripherals, while USB 2.0 ports accommodate older devices. The inclusion of PS/2 ports ensures compatibility with legacy keyboards and mice.
Box contents
- ASUS PRIME A520M-A II/CSM motherboard
- I/O shield
- User manual
- Warranty card
- SATA cables (quantity not specified)
Check before you buy
- Confirm your AMD Ryzen processor is compatible with AM4 socket
- Verify your case supports micro ATX form factor (244mm x 244mm)
- Check that your power supply has the required 24-pin ATX and 8-pin EPS connectors
- Ensure you have DDR4 memory modules for installation
Frequently Asked Questions
Q: What processors work with this motherboard?
A: AMD Ryzen 3 and 5 series processors with AM4 socket compatibility.
Q: Does this support Windows 11?
A: Officially supports Windows 10 x64; Windows 11 compatibility not specified.
Q: Can I use this for gaming?
A: Suitable for casual gaming and productivity, but lacks PCIe 4.0 support for high-end gaming builds.
Q: Is Wi-Fi included?
A: No, this motherboard does not include built-in Wi-Fi; requires separate adapter or Ethernet connection.
Q: What’s the warranty period?
A: Covered by the standard Manufacturer Warranty.
The Consultant’s verdict & warranty
The ASUS PRIME A520M-A II/CSM represents exceptional value for users prioritising stability, longevity, and proven technology over cutting-edge features. Its Corporate Stable Model status makes it particularly suitable for business environments, educational institutions, or home users who prefer reliability over bleeding-edge performance. The micro ATX form factor offers excellent versatility for space-constrained builds without sacrificing essential connectivity and expansion options. Covered by the standard Manufacturer Warranty.
| Internal I/O | |
|---|---|
| Number of M.2 (M) slots | 1 |
| 12V power connector | Yes |
| Supported storage drive interfaces | M.2, SATA III |
| USB 2.0 connectors | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| TPM connector | Yes |
| S/PDIF out connector | Yes |
| Number of SATA III connectors | 4 |
| Number of COM connectors | 1 |
| Number of chassis fan connectors | 2 |
| Front panel audio connector | Yes |
| EPS power connector (8-pin) | Yes |
| CPU fan connector | Yes |
| ATX Power connector (24-pin) | Yes |
| RGB LED pin header | Yes |
| Technical details | |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD A520 |
| Parallel processing technology support | Not supported |
| Motherboard form factor | micro ATX |
| Component for | PC |
| Audio | |
| Audio output channels | 7.1 channels |
| Performance | |
| Number of HDDs supported | 4 |
| Supported storage drive types | HDD & SSD |
| Windows operating systems supported | Windows 10 x64 |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD A520 |
| RAID levels | 0, 1, 10 |
| Audio output channels | 7.1 channels |
| Motherboard form factor | micro ATX |
| Component for | PC |
| Processor | |
| Processor manufacturer | AMD |
| Compatible processor series | AMD Ryzenâ„¢ 3, AMD Ryzenâ„¢ 5 |
| Processor socket | Socket AM4 |
| Memory | |
| Number of memory slots | 4 |
| Memory slots type | DIMM |
| Supported memory types | DDR4-SDRAM |
| Memory channels | Dual-channel |
| Supported memory clock speeds | 2133,2400,2666,2800,3000,3200,3333,3466,3600,3733,3866,4100,4133,4400,4466,4600,4800 MHz |
| Maximum internal memory | 128 GB |
| Unbuffered memory | Yes |
| Storage controllers | |
| Number of HDDs supported | 4 |
| Supported storage drive types | HDD & SSD |
| Supported storage drive interfaces | M.2, SATA III |
| RAID levels | 0, 1, 10 |
| Number of storage drives supported | 5 |
| RAID support | Yes |
| Graphics | |
| Parallel processing technology support | Not supported |
| Rear panel I/O ports | |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
| USB connector type | USB Type-A |
| USB 2.0 ports quantity | 2 |
| VGA (D-Sub) ports quantity | 1 |
| PS/2 ports quantity | 1 |
| Microphone in | Yes |
| HDMI ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 1 |
| DisplayPorts quantity | 1 |
| Network | |
| Ethernet LAN | Yes |
| Wi-Fi | No |
| Ethernet interface type | Gigabit Ethernet |
| Features | |
| Windows operating systems supported | Windows 10 x64 |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD A520 |
| Audio output channels | 7.1 channels |
| Motherboard form factor | micro ATX |
| Component for | PC |
| Audio chip | Realtek ALC887 / Realtek ALC897 |
| Expansion slots | |
| Number of M.2 (M) slots | 1 |
| PCI Express x1 (Gen 3.x) slots | 2 |
| PCI Express x16 (Gen 3.x) slots | 1 |
| BIOS | |
| BIOS type | UEFI AMI |
| BIOS memory size | 128 Mbit |
| Software | |
| Windows operating systems supported | Windows 10 x64 |
| Weight & dimensions | |
| Width | 244 mm |
| Depth | 244 mm |
| Identifiers | |
| Distributor SKUs | MBD-90MB17H0-M0EAYC, 8173240, 123923, 10441053, 479537, STD10215122, 2110349, CL90MB17H0-M0EAYC |
| Additional EANs | 0195553135399 |

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