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ASUS PRIME B550M-K ARGB vs ASUS PRIME B550M-K/CSM

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

Compared products

YOUR FIRST CHOICE

ASUS PRIME B550M-K ARGB

UK manufacturer specification · PRIME B550M-K ARGB

Full product profile Official image

Exact model & source notes

PRIME B550M-K ARGB 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

8 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 8 verified differences

THE CONTENDER

ASUS PRIME B550M-K/CSM

Global manufacturer specification · PRIME B550M-K/CSM

Full product profile Official image

Exact model & source notes

PRIME B550M-K/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 B550M-K ARGB UK & US retailers

UK & US price history: no verified listing yet

PRIME B550M-K/CSM UK & US retailers

UK & US price history: no verified listing yet

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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 B550M-K ARGBmicro-ATX Form Factor 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )

Manufacturer specification

Source 1

ASUS PRIME B550M-K/CSMmATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 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 ↓

8 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 B550M-K ARGBmicro-ATX Form Factor 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )

ASUS PRIME B550M-K/CSMmATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/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 B550M-K ARGB2 x DIMM slots, Max. 64GB, DDR4 5100(OC)/4866(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/.

ASUS PRIME B550M-K/CSM4 x DIMM, Max. 128GB, DDR4 4866(OC)/4800(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), and memory frequency support depends on the CPU types.

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Storage interfaces and restrictions

In Visual facts

ASUS PRIME B550M-K ARGBTotal supports 2 x M.2 slots and 4 x SATA 6Gb/s ports* AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 & SATA modes) AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) AMD B550 Chipset M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes) 4 x SATA 6Gb/s ports * AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10.

ASUS PRIME B550M-K/CSMSupports 2 x M.2 slots and 4 x SATA 6Gb/s ports AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 & SATA modes) AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes) AMD B550 Chipset M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) 4 x SATA 6Gb/s ports

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Audio interfaces

In Visual facts

ASUS PRIME B550M-K ARGBRealtek 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.

ASUS PRIME B550M-K/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.

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Expansion slots and restrictions

In Visual facts

ASUS PRIME B550M-K ARGBAMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x16 mode) AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode) AMD B550 Chipset 1 x PCIe 3.0 x1 slot * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/). - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/ for the list of supported peripherals.

ASUS PRIME B550M-K/CSMAMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x16 mode) AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode) AMD B550 Chipset 2 x PCIe 3.0 x1 slots

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Internal headers and connectors

In Visual facts

ASUS PRIME B550M-K ARGBFan and Cooling related 1 x 4-pin CPU Fan header 2 x 4-pin Chassis Fan headers Power related 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector Storage related 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 3.2 Gen 1 (5G) connector (supports USB Type-C® ) 1 x USB 3.2 Gen 1 (5G) header supports 2 additional USB 3.2 Gen 1 ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 3 x Addressable Gen 2 headers 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 (14-1 pin) 1 x 10-1 pin System Panel header

ASUS PRIME B550M-K/CSMFan and Cooling related 1 x 4-pin CPU Fan header 2 x 4-pin Chassis Fan headers Power related 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector Storage related 2 x M.2 slots (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

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Show 2 more verified differences

Rear-panel ports

In Visual facts

ASUS PRIME B550M-K ARGB4 x USB 3.2 Gen 1 (5G) ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x DisplayPort 1 x HDMI™ port 1 x Realtek 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port

ASUS PRIME B550M-K/CSM2 x USB 3.2 Gen 2 ports (2 x Type-A) 4 x USB 3.2 Gen 1 ports (4 x Type-A) 1 x D-Sub port 1 x DVI-D port 1 x HDMI™ port 1 x Realtek 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/CSM — official Global technical specifications

Check the exact configuration and source conditions for your use.

USB ports and headers

ASUS PRIME B550M-K ARGBRear USB (Total 6 ports) 4 x USB 3.2 Gen 1 (5G) ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) Front USB (Total 7 ports) 1 x USB 3.2 Gen 1 (5G) connector (supports USB Type-C®) 1 x USB 3.2 Gen 1 (5G) header supports 2 additional USB 3.2 Gen 1 ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports

ASUS PRIME B550M-K/CSMRear USB (Total 6 ports) 2 x USB 3.2 Gen 2 ports (2 x Type-A) 4 x USB 3.2 Gen 1 ports (4 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

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/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 B550M-K ARGBWindows® 11, Windows® 10 64-bit

ASUS PRIME B550M-K/CSMWindows 11, Windows 10 64-bit

Sources

ASUS PRIME B550M-K ARGB

Manufacturer specification

ASUS PRIME B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/CSM

Manufacturer specification

ASUS PRIME B550M-K/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 B550M-K ARGBAMD Socket AM4 for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors* * Refer to www.asus.com for CPU support list. BIOS: 128 Mb Flash ROM, UEFI AMI BIOS

ASUS PRIME B550M-K/CSMAMD Socket AM4 for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors* * Refer to www.asus.com for CPU support list. BIOS: 256 Mb Flash ROM, UEFI AMI BIOS

Sources

ASUS PRIME B550M-K ARGB

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 B550M-K ARGB — official UK technical specifications

ASUS PRIME B550M-K/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 B550M-K/CSM — official Global technical specifications

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

3 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

ASUS PRIME B550M-K ARGB

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 B550M-K/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 B550M-K ARGB and ASUS PRIME B550M-K/CSM
Specification	ASUS PRIME B550M-K ARGB	ASUS PRIME B550M-K/CSM

CPU socket Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	AM4	AM4
Chipset Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	AMD B550 Chipset	AMD B550 Chipset
Form factor and dimensionsDifferent Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	micro-ATX Form Factor 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )	mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )
CPU support and BIOS requirementsDifferent Sources ASUS PRIME B550M-K ARGB 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 B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/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 B550M-K/CSM — official Global technical specifications	*AMD Socket AM4 for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors * Refer to www.asus.com for CPU support list. BIOS: 128 Mb Flash ROM, UEFI AMI BIOS**	*AMD Socket AM4 for AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors * Refer to www.asus.com for CPU support list. BIOS: 256 Mb Flash ROM, UEFI AMI BIOS**
Listed operating systems Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/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 B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	2 x DIMM slots, Max. 64GB, DDR4 5100(OC)/4866(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/.	4 x DIMM, Max. 128GB, DDR4 4866(OC)/4800(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), and memory frequency support depends on the CPU types.

Storage interfaces and restrictionsDifferent Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports* AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 & SATA modes) AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) AMD B550 Chipset M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes) 4 x SATA 6Gb/s ports * AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1/10.	Supports 2 x M.2 slots and 4 x SATA 6Gb/s ports AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 & SATA modes) AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes) AMD B550 Chipset M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes) 4 x SATA 6Gb/s ports

Expansion slots and restrictionsDifferent Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x16 mode) AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode) AMD B550 Chipset 1 x PCIe 3.0 x1 slot * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/). - To ensure compatibility of the device installed, please refer to https://www.asus.com/support/ for the list of supported peripherals.	AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x16 mode) AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors 1 x PCIe 3.0 x16 slot (supports x16 mode) AMD B550 Chipset 2 x PCIe 3.0 x1 slots

USB ports and headersDifferent Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	Rear USB (Total 6 ports) 4 x USB 3.2 Gen 1 (5G) ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) Front USB (Total 7 ports) 1 x USB 3.2 Gen 1 (5G) connector (supports USB Type-C®) 1 x USB 3.2 Gen 1 (5G) header supports 2 additional USB 3.2 Gen 1 ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports	Rear USB (Total 6 ports) 2 x USB 3.2 Gen 2 ports (2 x Type-A) 4 x USB 3.2 Gen 1 ports (4 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-panel portsDifferent Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	4 x USB 3.2 Gen 1 (5G) ports (4 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x DisplayPort 1 x HDMI™ port 1 x Realtek 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port	2 x USB 3.2 Gen 2 ports (2 x Type-A) 4 x USB 3.2 Gen 1 ports (4 x Type-A) 1 x D-Sub port 1 x DVI-D port 1 x HDMI™ port 1 x Realtek 1Gb Ethernet port 3 x Audio jacks 1 x PS/2 Keyboard/Mouse combo port
Audio interfacesDifferent Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/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 - 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 - 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.

Network interfaces and requirements Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	1 x Realtek 1Gb Ethernet	1 x Realtek 1Gb Ethernet

Internal headers and connectorsDifferent Sources ASUS PRIME B550M-K ARGB Manufacturer specification ASUS PRIME B550M-K ARGB — official UK technical specifications ASUS PRIME B550M-K/CSM Manufacturer specification ASUS PRIME B550M-K/CSM — official Global technical specifications	Fan and Cooling related 1 x 4-pin CPU Fan header 2 x 4-pin Chassis Fan headers Power related 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector Storage related 2 x M.2 slots (Key M) 4 x SATA 6Gb/s ports USB 1 x USB 3.2 Gen 1 (5G) connector (supports USB Type-C® ) 1 x USB 3.2 Gen 1 (5G) header supports 2 additional USB 3.2 Gen 1 ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports Miscellaneous 3 x Addressable Gen 2 headers 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 (14-1 pin) 1 x 10-1 pin System Panel header	Fan and Cooling related 1 x 4-pin CPU Fan header 2 x 4-pin Chassis Fan headers Power related 1 x 24-pin Main Power connector 1 x 8-pin +12V Power connector Storage related 2 x M.2 slots (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

First product manufacturer source Second product manufacturer source

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ASUS PRIME B550M-K

CPU socket: AM4
Chipset: AMD B550 Chipset
Form factor and dimensions: mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )

Prices & product profile

ASUS PRIME B550M-K ARGB-CSM

CPU socket: AM4
Chipset: AMD B550 Chipset
Form factor and dimensions: micro-ATX Form Factor 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )

Prices & product profile

ASUS PRIME B550M-A WIFI II

CPU socket: AM4
Chipset: AMD B550 Chipset
Form factor and dimensions: mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )

Prices & product profile

ASUS PRIME B550M-A WIFI II-CSM

CPU socket: AM4
Chipset: AMD B550 Chipset
Form factor and dimensions: mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 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.