MOTHERBOARDS · YOUR NEXT FACE-OFF

ASUS PRIME A520M-E/CSM vs ASUS PRIME A520M-R-CSM

Real specs. Clear sources.Exact models · UK & US buying links

Compared products

YOUR FIRST CHOICE

ASUS PRIME A520M-E/CSM

UK manufacturer specification · PRIME A520M-E/CSM

Full product profile Official image

Exact model & source notes

PRIME A520M-E/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.

Manufacturer specifications

WHAT DIFFERS

9 verified differences, led by Form factor and dimensions, memory type, slots and limit and storage interfaces and restrictions. Compared in full below. Not a rating.

See the 9 verified differences

THE CONTENDER

ASUS PRIME A520M-R-CSM

Global manufacturer specification · PRIME A520M-R-CSM

Full product profile Official image

Exact model & source notes

PRIME A520M-R-CSM motherboard, identified in the ASUS Global 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.

Manufacturer specifications

PRIME A520M-E/CSM UK & US retailers

UK & US price history: no verified listing yet

PRIME A520M-R-CSM UK & US retailers

UK & US price history: no verified listing yet

Search links open retailer results, not a matched listing; eBay listings are checked daily. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.

THE DIFFERENCES, MADE VISIBLE

Visual facts

Differences first. Select a topic for its graphic, sources and conditions.

How to read this comparison

Manufacturer facts for the exact models shown. Not a quality rating or a test result.
“Different” means the known values differ, not that one is better.
Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.

SPECIFICATIONS SIDE BY SIDE7 topics

SELECTED TOPIC

01 / 07

Form factor and dimensions

Check the exact configuration and source conditions for your use.

ASUS PRIME A520M-E/CSMmATX Form Factor 8.9 inch x 8.7 inch ( 22.6 cm x 22.1 cm )

Manufacturer specification

Source 1

ASUS PRIME A520M-R-CSMmicro-ATX Form Factor 9.3 inch x 7.6 inch ( 23.6 cm x 19.3 cm )

Manufacturer specification

Source 1

Explore the full specifications

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.

WHAT CHANGES BETWEEN THEM?

Key differences

Full specifications ↓

9 verified differences, most decision-relevant first. 7 are also drawn in Visual facts above. 1 feature is the same under different published names, grouped below. Missing information stays separate.

Form factor and dimensions

In Visual facts

ASUS PRIME A520M-E/CSMmATX Form Factor 8.9 inch x 8.7 inch ( 22.6 cm x 22.1 cm )

ASUS PRIME A520M-R-CSMmicro-ATX Form Factor 9.3 inch x 7.6 inch ( 23.6 cm x 19.3 cm )

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Memory type, slots and limit

In Visual facts

ASUS PRIME A520M-E/CSM2 x DIMM slots, max. 64GB, DDR4 5100(OC)/ 4866(OC)/ 4666(OC)/ 4600(OC)/ 4466(OC)/ 4400(OC)/ 4333(OC)/ 4266(OC)/ 4200(OC)/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3733(OC)/ 3600(OC)/ 3466(OC)/ 3400(OC)/ 3333(OC)/ 3200/ 3000/ 2933/ 2800/ 2666/ 2400/ 2133, Un-buffered Memory* Dual Channel Memory Architecture *ECC memory(ECC mode) support varies by CPU. *Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).

ASUS PRIME A520M-R-CSM2 x DIMM slots, max. 64GB, DDR4 5100(OC)/ 4866(OC)/ 4666(OC)/ 4600(OC)/ 4466(OC)/ 4400(OC)/ 4333(OC)/ 4266(OC)/ 4200(OC)/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3733(OC)/ 3600(OC)/ 3466(OC)/ 3400(OC)/ 3333(OC)/ 3200/ 3000/ 2933/ 2800/ 2666/ 2400/ 2133, Un-buffered Memory* Dual channel memory architecture * ECC memory (ECC mode) support varies by CPU. * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/.

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Storage interfaces and restrictions

In Visual facts

ASUS PRIME A520M-E/CSMTotal supports 1 x M.2 slot and 4 x SATA 6Gb/s ports AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors M.2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) AMD A520 Chipset 4 x SATA 6Gb/s ports Support RAID 0, 1, 10

ASUS PRIME A520M-R-CSMSupports 1 x M.2 slot and 4 x SATA 6Gb/s ports* AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors M.2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) AMD A520 Chipset 4 x SATA 6Gb/s ports * AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10.

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Network interfaces and requirements

In Visual facts

ASUS PRIME A520M-E/CSM1 x Realtek RTL8111H 1Gb Ethernet

ASUS PRIME A520M-R-CSM1 x Realtek 1Gb Ethernet

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Audio interfaces

In Visual facts

ASUS PRIME A520M-E/CSMRealtek 7.1 Surround Sound High Definition Audio CODEC* - Supports Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - LED-illuminated audio trace path design - Premium audio capacitors - Dedicated audio PCB layers *A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

ASUS PRIME A520M-R-CSMRealtek 7.1 Surround Sound High Definition Audio CODEC* - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - Premium audio capacitors - Dedicated audio PCB layers * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Expansion slots and restrictions

In Visual facts

ASUS PRIME A520M-E/CSMAMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode) AMD A520 Chipset 2 x PCIe 3.0 x1 slots

ASUS PRIME A520M-R-CSMAMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode) AMD A520 Chipset 1 x PCIe 3.0 x1 slot - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/ for the list of supported peripherals.

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Show 3 more verified differences

Internal headers and connectors

In Visual facts

ASUS PRIME A520M-E/CSMFan and cooling related 1 x 4-pin CPU Fan header 1 x 4-pin Chassis Fan header Power related 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector Storage related 1 x M.2 slot (Key M) 4 x SATA 6Gb/s ports USB 1 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 Miscellaneous 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (AAFP) 1 x S/PDIF Out header 1 x Speaker header 1 x SPI TPM header (14-1pin) 1 x 10-1 pin System Panel header

ASUS PRIME A520M-R-CSMFan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin Chassis Fan header Power Related 1 x 24-pin Main Power connector 1 x 4-pin +12V Power connector Storage Related 1 x M.2 slot (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x Speaker header 1 x SPI TPM header (14-1pin) 1 x 10-1 pin System Panel header

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Rear-panel ports

ASUS PRIME A520M-E/CSM1 x USB 3.2 Gen 2 port (1 x Type-A) 4 x USB 3.2 Gen 1 ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x D-Sub port 1 x DVI-D port 1 x HDMI™ port 1 x Realtek RTL8111H 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port

ASUS PRIME A520M-R-CSM4 x USB 5Gbps ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x HDMI™ port 1 x Realtek 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 keyboard (purple) port 1 x PS/2 mouse (green) port

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

USB ports and headers

ASUS PRIME A520M-E/CSMRear USB (Total 7 ports) 1 x USB 3.2 Gen 2 port (1 x Type-A) 4 x USB 3.2 Gen 1 ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) Front USB (Total 6 ports) 1 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

ASUS PRIME A520M-R-CSMRear USB (Total 6 ports) 4 x USB 5Gbps ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) Front USB (Total 6 ports) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Same feature, different names (1)

The sources publish different names for the same feature. Both names and their sources are shown; they are not counted as differences.

Listed operating systems

ASUS PRIME A520M-E/CSMWindows 11, Windows 10 64-bit

ASUS PRIME A520M-R-CSMWindows® 11, Windows® 10 64-bit

Sources

ASUS PRIME A520M-E/CSM

Manufacturer specification

ASUS PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-CSM

Manufacturer specification

ASUS PRIME A520M-R-CSM — official Global technical specifications

Both sources state the same feature under different published names. This is not a verified difference; check the exact feature you need.

Configuration & compatibility details (1)

CPU support and BIOS requirements

ASUS PRIME A520M-E/CSMAMD Socket AM4 for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors* *Refer to www.asus.com for CPU support list. BIOS: 256 Mb Flash ROM, UEFI AMI BIOS

ASUS PRIME A520M-R-CSMAMD Socket AM4 for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors* * Refer to www.asus.com for CPU support list. BIOS: 128 Mb Flash ROM, UEFI AMI BIOS

Sources

ASUS PRIME A520M-E/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 PRIME A520M-E/CSM — official UK technical specifications

ASUS PRIME A520M-R-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 PRIME A520M-R-CSM — official Global technical specifications

These descriptions or measurements differ. Wording alone does not establish a different capability; check the exact configuration.

2 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

ASUS PRIME A520M-E/CSM

What it brings

Published motherboard interfaces and configuration are available from the exact-model ASUS specification source.
Manufacturer source

What to check

Compatibility and maximum operating modes depend on the source’s stated hardware, firmware and connection requirements; manufacturer figures are not independent measurements.
Manufacturer source

ASUS PRIME A520M-R-CSM

What it brings

Published motherboard interfaces and configuration are available from the exact-model ASUS specification source.
Manufacturer source

What to check

Compatibility and maximum operating modes depend on the source’s stated hardware, firmware and connection requirements; manufacturer figures are not independent measurements.
Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

13 of 13 specifications Sources in each row

Source-backed specifications for ASUS PRIME A520M-E/CSM and ASUS PRIME A520M-R-CSM
Specification	ASUS PRIME A520M-E/CSM	ASUS PRIME A520M-R-CSM

CPU socket Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	AM4	AM4
Chipset Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	AMD A520 Chipset	AMD A520 Chipset
Form factor and dimensionsDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	mATX Form Factor 8.9 inch x 8.7 inch ( 22.6 cm x 22.1 cm )	micro-ATX Form Factor 9.3 inch x 7.6 inch ( 23.6 cm x 19.3 cm )
CPU support and BIOS requirementsDifferent Sources ASUS PRIME A520M-E/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 PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-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 PRIME A520M-R-CSM — official Global technical specifications	AMD Socket AM4 for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors* *Refer to www.asus.com for CPU support list. BIOS: 256 Mb Flash ROM, UEFI AMI BIOS	AMD Socket AM4 for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors* * Refer to www.asus.com for CPU support list. BIOS: 128 Mb Flash ROM, UEFI AMI BIOS
Listed operating systems Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	Windows 11, Windows 10 64-bit	Windows® 11, Windows® 10 64-bit

Memory type, slots and limitDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	2 x DIMM slots, max. 64GB, DDR4 5100(OC)/ 4866(OC)/ 4666(OC)/ 4600(OC)/ 4466(OC)/ 4400(OC)/ 4333(OC)/ 4266(OC)/ 4200(OC)/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3733(OC)/ 3600(OC)/ 3466(OC)/ 3400(OC)/ 3333(OC)/ 3200/ 3000/ 2933/ 2800/ 2666/ 2400/ 2133, Un-buffered Memory* Dual Channel Memory Architecture ECC memory(ECC mode) support varies by CPU. Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).	2 x DIMM slots, max. 64GB, DDR4 5100(OC)/ 4866(OC)/ 4666(OC)/ 4600(OC)/ 4466(OC)/ 4400(OC)/ 4333(OC)/ 4266(OC)/ 4200(OC)/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3733(OC)/ 3600(OC)/ 3466(OC)/ 3400(OC)/ 3333(OC)/ 3200/ 3000/ 2933/ 2800/ 2666/ 2400/ 2133, Un-buffered Memory* Dual channel memory architecture * ECC memory (ECC mode) support varies by CPU. * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/.

Storage interfaces and restrictionsDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	Total supports 1 x M.2 slot and 4 x SATA 6Gb/s ports AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors M.2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) AMD A520 Chipset 4 x SATA 6Gb/s ports Support RAID 0, 1, 10	Supports 1 x M.2 slot and 4 x SATA 6Gb/s ports* AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors M.2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) AMD A520 Chipset 4 x SATA 6Gb/s ports * AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10.

Expansion slots and restrictionsDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode) AMD A520 Chipset 2 x PCIe 3.0 x1 slots	AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series/ 3000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode) AMD A520 Chipset 1 x PCIe 3.0 x1 slot - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/ for the list of supported peripherals.

USB ports and headersDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	Rear USB (Total 7 ports) 1 x USB 3.2 Gen 2 port (1 x Type-A) 4 x USB 3.2 Gen 1 ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) Front USB (Total 6 ports) 1 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	Rear USB (Total 6 ports) 4 x USB 5Gbps ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) Front USB (Total 6 ports) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports
Rear-panel portsDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	1 x USB 3.2 Gen 2 port (1 x Type-A) 4 x USB 3.2 Gen 1 ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x D-Sub port 1 x DVI-D port 1 x HDMI™ port 1 x Realtek RTL8111H 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port	4 x USB 5Gbps ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x HDMI™ port 1 x Realtek 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 keyboard (purple) port 1 x PS/2 mouse (green) port
Audio interfacesDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	Realtek 7.1 Surround Sound High Definition Audio CODEC* - Supports Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - LED-illuminated audio trace path design - Premium audio capacitors - Dedicated audio PCB layers *A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.	Realtek 7.1 Surround Sound High Definition Audio CODEC* - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - Premium audio capacitors - Dedicated audio PCB layers * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Network interfaces and requirementsDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	1 x Realtek RTL8111H 1Gb Ethernet	1 x Realtek 1Gb Ethernet

Internal headers and connectorsDifferent Sources ASUS PRIME A520M-E/CSM Manufacturer specification ASUS PRIME A520M-E/CSM — official UK technical specifications ASUS PRIME A520M-R-CSM Manufacturer specification ASUS PRIME A520M-R-CSM — official Global technical specifications	Fan and cooling related 1 x 4-pin CPU Fan header 1 x 4-pin Chassis Fan header Power related 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector Storage related 1 x M.2 slot (Key M) 4 x SATA 6Gb/s ports USB 1 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 Miscellaneous 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (AAFP) 1 x S/PDIF Out header 1 x Speaker header 1 x SPI TPM header (14-1pin) 1 x 10-1 pin System Panel header	Fan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin Chassis Fan header Power Related 1 x 24-pin Main Power connector 1 x 4-pin +12V Power connector Storage Related 1 x M.2 slot (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 1 x Clear CMOS header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x Speaker header 1 x SPI TPM header (14-1pin) 1 x 10-1 pin System Panel header

First product manufacturer source Second product manufacturer source

FIND YOUR CONTENDERS

More products

Closest motherboards to this pair by shared key specifications. Not a popularity ranking.

See all 617 motherboards

ASUS PRIME A520M-E

CPU socket: AM4
Chipset: AMD A520 Chipset
Form factor and dimensions: mATX Form Factor 8.9 inch x 8.7 inch ( 22.6 cm x 22.1 cm )

Prices & product profile

ASUS PRIME A520M-K/CSM

CPU socket: AM4
Chipset: AMD A520 Chipset
Form factor and dimensions: mATX Form Factor 8.9 inch x 8.7 inch ( 22.6 cm x 22.1 cm )

Prices & product profile

ASUS PRIME A520M-K

CPU socket: AM4
Chipset: AMD A520 Chipset
Form factor and dimensions: mATX Form Factor 8.9 inch x 8.7 inch ( 22.6 cm x 22.1 cm )

Prices & product profile

ASUS PRIME A520M-R

CPU socket: AM4
Chipset: AMD A520 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.3 inch x 7.6 inch ( 23.6 cm x 19.3 cm )

Prices & product profile

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.