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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

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Delivery options
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Description

Item No. 113e80ba-00da-4e32-b61d-9de20cd22c31
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,

Attributes

Motherboard Characteristics

  • Processor Socket: Socket AM4

Details

ASUS Pro A520M-C II/CSM — Business Micro-ATX forAMD 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 theAMD A520 chipset and the Socket AM4 platform, supportingAMD 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 orAMD 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 officeAMD 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 supportsAMD Ryzen 5000, 4000 G-Series and 3000 processors on Socket AM4. It does not support Intel CPUs orAMD 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 industrialAMD 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, manageableAMD 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 anAMD B650 (AM5, DDR5) board for more performance.