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ASUS Pro A520M-C II/CSM Business Micro-ATX Motherboard Socket AM4 AMD A520 DDR4 PCIe 3.0 M.2 Quad Display GbE Black

Brand:
ASUS
ASUS Pro A520MC IICSM Motherboard 90MB18F0M0EAYC
ASUS Pro A520M-C II/CSM Business Micro-ATX Motherboard Socket AM4 AMD A520 DDR4 PCIe 3.0 M.2 Quad Display GbE Black
€113.59 inc. VAT
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90MB18F0-M0EAYC
€95.45 €106.06
€113.59 inc. VAT
Ships from EU stock: 4 item(s)
Product Code
04:420284
EAN Code
4711081250098
Manufacturer
ASUS
Quick Specs
Socket
AMD AM4
Chipset
AMD A520
Memory
2× DDR4, up to 64GB
Form Factor
Micro-ATX
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ASUS Pro A520M-C II/CSM — Business Micro-ATX for AMD AM4

AMD AM4 · A5202× DDR4 up to 64GBPCIe 3.0 + M.2Quad Display · GbE

The ASUS Pro A520M-C II/CSM is a business-focused micro-ATX motherboard built on the AMD A520 chipset and the Socket AM4 platform, supporting AMD Ryzen 5000, 4000 G-Series and 3000 processors. Sold under ASUS part number 90MB18F0-M0EAYC (EAN 4711081250098), it offers DDR4 memory, an M.2 NVMe slot, four SATA ports, a legacy PCI slot and quad display output (HDMI, DisplayPort, DVI-D and VGA) — with commercial-grade reliability, security and manageability for office and corporate deployments. Typically in stock with fast delivery across Cyprus.

Compatibility — read before buying
This is an AMD Socket AM4 board on the entry A520 chipset, supporting Ryzen 5000 / 4000G / 3000 processors — it is not compatible with Intel CPUs or AMD AM5 (Ryzen 7000+). It uses DDR4 memory only (not DDR5) and runs at PCIe 3.0 (the A520 chipset does not provide PCIe 4.0, and CPU overclocking is not supported).

Best For

✓Business and office AMD AM4 desktops
✓Multi-monitor productivity setups (quad display)
✓Systems needing a legacy PCI slot
✓Reusing existing AM4 CPUs and DDR4 memory
✓IT-managed commercial deployments
✓Budget Ryzen office builds

Key Features

 
CSM business reliability
As an ASUS Pro CSM commercial board it offers enhanced longevity, security and manageability features for IT-managed corporate fleets.
 
Quad display + legacy PCI
HDMI 2.1, DisplayPort, DVI-D and VGA outputs drive up to four monitors, while a legacy PCI slot supports older expansion cards still used in business and industrial settings.
 
DDR4 memory
Two DDR4 DIMM slots support up to 64GB of dual-channel memory at up to 4866 MHz (OC) for responsive office multitasking.
 
M.2 + 4× SATA storage
An M.2 slot (PCIe 3.0 x4 / SATA) for a fast NVMe boot drive, plus four SATA 6Gb/s ports and Realtek ALC897 7.1 audio.

Technical Specifications

Identification
Part Number 90MB18F0-M0EAYC
EAN / GTIN 4711081250098
Model ASUS Pro A520M-C II/CSM
Brand ASUS
Platform
Chipset AMD A520
Socket AMD AM4
CPU Support Ryzen 5000 / 4000G / 3000
Form Factor Micro-ATX
Program CSM — Corporate Stable Model
Memory
Slots 2× DDR4 DIMM (Dual-Channel)
Max Capacity 64GB
Speed DDR4 up to 4866 MHz (OC)
Expansion & Storage
PCIe Slots 1× PCIe 3.0 x16 + 2× PCIe 3.0 x1 + 1× PCI (legacy)
M.2 1× M.2 PCIe 3.0 x4 / SATA (2242/2260/2280)
SATA 4× SATA 6Gb/s
Connectivity & I/O
LAN Gigabit LAN (RJ-45)
Display Out 1× HDMI 2.1 (4K@60) + 1× DisplayPort + 1× DVI-D + 1× VGA
Rear USB 4× USB 3.2 Gen 1 + 2× USB 2.0 + PS/2
Audio Realtek ALC897 7.1-channel HD Audio
Other
Colour Black
Operating System Windows 11 64-bit

Frequently Asked Questions

Which CPUs work with the ASUS Pro A520M-C II/CSM?
It supports AMD Ryzen 5000, 4000 G-Series and 3000 processors on Socket AM4. It does not support Intel CPUs or AMD AM5 (Ryzen 7000+) processors.
Does it support PCIe 4.0 or overclocking?
No. The entry A520 chipset runs at PCIe 3.0 and does not support CPU overclocking. For PCIe 4.0 and overclocking, choose a B550 board.
How many monitors can it drive?
Using a Ryzen APU’s integrated graphics it offers HDMI, DisplayPort, DVI-D and VGA outputs, supporting up to four monitors directly from the motherboard.
Does it have a legacy PCI slot?
Yes. Alongside PCIe slots it includes a traditional PCI slot, useful for older expansion cards still used in business and industrial systems.
Singular Expert Insight
The Pro A520M-C II/CSM is built for the office, not gaming — its strengths are commercial reliability, quad display output and a legacy PCI slot, ideal for business and industrial AMD AM4 systems. Note the A520 chipset is PCIe 3.0 only with no overclocking; for PCIe 4.0 and more performance, a B550 board like the ASRock B550 Pro4 is the step up. Pair it with a reliable internal NVMe SSD for fast, dependable storage.

Buyer's Guide

Buy it if
You want a reliable, manageable AMD AM4 business board with quad display output and a legacy PCI slot for office or industrial use.
Skip it if
You want PCIe 4.0, CPU overclocking, DDR5 or the newer AM5 platform — choose a B550 (AM4) or B650 (AM5) board.
Also consider
The ASRock B550 Pro4 (PCIe 4.0, AM4) or an AMD B650 (AM5, DDR5) board for more performance.

Features - ASUS - 90MB18F0-M0EAYC

CPU Socket
  • Socket AM4
Colour
black
Interface
  • USB3.0,
  • M.2,
  • Ethernet
More Details
Product Code
04:420284
EAN Code
4711081250098
Manufacturer
ASUS
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