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Green Micro-ATX board, silver AM4 socket, two black DDR4 slots, four SATA ports, single M.2, HDMI and D-Sub video

ASUS

ASUS PRIME A520M-K AMD motherboard

SKU CH-R35H-5W1VB

Micro-ATX board for AM4 Ryzen CPUs with two DDR4 slots up to 64 GB, one PCIe 3.0 x16 slot, one M.2 Key M slot, four SATA ports and 1 Gb Ethernet

  • ProcessorAMD Socket AM4 for 3rd Gen AMD Ryzen and 3rd Gen AMD Ryzen w
  • ChipsetAMD A520
  • Form factorMicro ATX
  • Memory slot count2 × 288pin (DDR4)
  • Supported memoryDDR4 4600(O.C.)/ 4400(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.
  • Max supported RAM64 GB
  • Supports 3rd Gen Ryzen and Ryzen with Radeon Graphics on AM4 socket
  • Dual-channel DDR4 up to 64 GB at speeds from 2133 to 4600 MHz
  • PCIe 3.0 x16 slot plus two x1 slots for expansion cards
  • M.2 Key M slot fits 2242, 2260 or 2280 drives in PCIe 3.0 x4 or SATA mode
  • Four SATA 6 Gb/s ports with RAID 0, 1, 10 plus Realtek ALC887 7.1 audio and RTL8111H 1 Gbps LAN

Socket AM4 DDR4 Micro-ATX Motherboard

The ASUS PRIME A520M-K is a Micro-ATX motherboard built around the AMD A520 chipset and Socket AM4. It supports 3rd Gen AMD Ryzen processors and 3rd Gen AMD Ryzen with Radeon Graphics processors. The board provides two 288-pin DDR4 slots with a maximum capacity of 64GB running in dual-channel mode.

Entry Builders and Office Systems

This board suits builders assembling a cost-effective desktop for everyday computing or office work using a Ryzen APU or CPU without overclocking. It offers four SATA 6Gb/s ports, one M.2 slot for 2242/2260/2280 drives, and a single PCIe 3.0 x16 slot for a graphics card. Users who need CPU overclocking, multiple GPU slots, or more than two memory slots should consider a different chipset.

M.2 Key M 2280 PCIe 3.0 x4

The single M.2 slot accepts Key M modules in 2242, 2260, and 2280 lengths and operates in either PCIe 3.0 x4 or SATA mode. This single specification determines whether your chosen solid-state drive will be compatible with the board.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $98.99
Cheaper than about 76% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model namePRIME A520M-K
Processor
ProcessorAMD Socket AM4 for 3rd Gen AMD Ryzen and 3rd Gen AMD Ryzen with Radeon Graphics Processors*
* Refer to www.asus.com for CPU support list.
ChipsetAMD A520
Memory
Memory slot count2 × 288pin (DDR4)
Max supported RAM64 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots3rd Gen AMD Ryzen and 3rd Gen AMD Ryzen with Radeon Graphics Processors
M.2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes)
SATA and RAID support0/1/10
Audio & video
Audio chipRealtek ALC887
Sound channels7.1 Channels
* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Connectivity
Ethernet controllerRealtek RTL8111H
Maximum network speed1 Gbit/s
Ports & slots
PCIe 3.0 x16 slots3rd Gen AMD Ryzen and 3rd Gen AMD Ryzen with Radeon Graphics Processors
1 x PCIe 3.0 x16 slot (supports x16 mode)
PCIe x1 slotsAMD A520 Chipset
2 x PCIe 3.0 x1 slots
Onboard USB headers1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
1 × 8-pin +12 V Power connector
Size & build
Form factorMicro ATX
Width and length8.9 in × 8.7 in
Compatibility
Windows 11 supportSupported
More details
LightingNone RGB

Questions about this item

Which DDR4 modules and maximum capacity do I need for the PRIME A520M-K?

Install up to 64 GB using two 288-pin DDR4 DIMMs; the board runs at 2133–3200 MHz natively and up to 4600 MHz when overclocked in dual-channel mode.

Can I keep my existing PCIe 3.0 add-in cards with this A520 board?

Yes — one full-length PCIe 3.0 x16 slot and two PCIe 3.0 x1 slots accept current graphics, sound or networking cards without bandwidth loss.

How do I verify the M.2 drive is running at PCIe 3.0 x4 speed after installation?

Enter the UEFI and confirm the M.2 slot shows a PCIe 3.0 x4 link, or check the negotiated speed in the OS device manager or benchmark tool.

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