ASUS PRIME B550M-A WIFI IIUK manufacturer specification · PRIME B550M-A WIFI II- Form factor and dimensions
- mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )This one: micro-ATX Form Factor 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )
MOTHERBOARDS
ASUS PRIME B550M-K ARGB
UK manufacturer specification
- 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 )
PRIME B550M-K ARGB motherboard, identified in the ASUS UK catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.
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THE ACTUAL PRODUCT
Compare with ASUS PRIME B550M-A WIFI II
Specifications checked 17 Oct 2026Manufacturer specifications, not a hands-on test.
The nearest checked motherboards by key specifications, with what differs from the ASUS PRIME B550M-K ARGB. The first matches the Compare button above.
ASUS PRIME B550M-A WIFI IIUK manufacturer specification · PRIME B550M-A WIFI II
ASUS PRIME B550M-KUK manufacturer specification · PRIME B550M-K- Form factor and dimensions
- mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )This one: micro-ATX Form Factor 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )
ASUS TUF GAMING B550M-E WIFIUK manufacturer specification · TUF GAMING B550M-E WIFI- Form factor and dimensions
- mATX Form Factor 9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )This one: micro-ATX Form Factor 9.6 inch x 8.7 inch ( 24.4 cm x 22.1 cm )
Key strengths
Published motherboard interfaces and configuration are available from the exact-model ASUS specification source.
Before you buy
Compatibility and maximum operating modes depend on the source’s stated hardware, firmware and connection requirements; manufacturer figures are not independent measurements.
Works with
Products in this catalogue that list the same socket or memory type as the ASUS PRIME B550M-K ARGB. A shared socket or memory type is necessary but not sufficient: check the exact CPU and memory support lists, and the BIOS version, before buying.
- 7 AM4 processorsSocket AM4 on both, from cited specifications
- 8 DDR4 memory kitsMemory type DDR4 on both, from cited specifications
Every specification. With its source.
Full specifications
Exact configuration: UK manufacturer specification · PRIME B550M-K ARGB
13 specifications in 9 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”.
Platform & board
3 items
Memory
1 item
- Memory type, slots and limit
- 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/.Source
Expansion slots
1 item
- Expansion slots and restrictions
- 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.Source
Storage
1 item
- Storage interfaces and restrictions
- 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.Source
USB & rear connections
2 items
- USB ports and headers
- 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 portsSource
- Rear-panel ports
- 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 portSource
Networking
1 item
- Network interfaces and requirements
- 1 x Realtek 1Gb EthernetSource
Audio
1 item
- Audio interfaces
- 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.Source
Power, cooling & lighting
1 item
- Internal headers and connectors
- 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 headerSource
BIOS, software & diagnostics
2 items
- CPU support and BIOS requirements
- 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
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.
Source - Listed operating systems
- Windows® 11, Windows® 10 64-bitSource
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