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MOTHERBOARDS

ASUS ROG STRIX B550-A GAMING

UK manufacturer specification

CPU socket
AM4
Chipset
AMD B550
Form factor and dimensions
ATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )

ROG STRIX B550-A GAMING motherboard, identified in the ASUS UK catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.

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Price history · UK
eBay UKnew · GBP

Item price · same listing and exact model

Tracking started 19 Oct. One price recorded so far; more daily observations are needed to show changes.

Latest check£104.70
Lowest shown£104.70

1 observed day · 19 Oct–19 Oct

eBay UK observed item prices1 observed days. Last checked price per UTC day. Missing dates break the line. Use Explore dates or the table for exact values.
£104.7019 Oct, 12:09 UTC

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Checked (UTC)Item price
£104.70

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THE ACTUAL PRODUCT
ASUS ROG STRIX B550-A GAMING official product image
Official product image · Image source detailsProduct imagery does not establish a retailer’s bundle or condition.
Compare with ASUS TUF GAMING B450-PLUS II
Explore alternativesUpgrade from this product

Specifications checked 17 Oct 2026Manufacturer specifications, not a hands-on test.

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The nearest checked motherboards by key specifications, with what differs from the ASUS ROG STRIX B550-A GAMING. The first matches the Compare button above.

The useful part.

Key strengths

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

Manufacturer source
The checks that matter.

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.

Manufacturer source
Build around it.

Works with

Products in this catalogue that list the same socket or memory type as the ASUS ROG STRIX B550-A GAMING. 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.

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Full specifications

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Exact configuration: UK manufacturer specification · ROG STRIX B550-A GAMING

13 specifications in 9 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”.

Platform & board

3 items
CPU socket
AM4Source
Chipset
AMD B550Source
Form factor and dimensions
ATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )Source

Memory

1 item
Memory type, slots and limit
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors 4 x DIMM, Max. 128GB, DDR4 4600(O.C)/4400(O.C)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3600(O.C.)/3466(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory AMD RyzenTM 4000 G-Series Processors 4 x DIMM, Max. 128GB, DDR4 5100(O.C)/4800(O.C.)/4600(O.C)/4400(O.C)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3600(O.C.)/3466(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory Dual Channel Memory Architecture OptiMem II ECC Memory (ECC mode) support varies by CPU. * Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).Source

Expansion slots

1 item
Expansion slots and restrictions
AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors 1 x PCIe 4.0 x16 (x16 mode) AMD RyzenTM 4000 G-Series Processor 1 x PCIe 3.0 x16 (x16 mode) AMD B550 Chipset 1 x PCIe 3.0 x16 (x4 mode) * 3 x PCIe 3.0 x1Source

Storage

1 item
Storage interfaces and restrictions
Total supports 2 x M.2 slot(s) and 6 x SATA 6Gb/s ports AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors: 1 x M.2_1 socket 3, with M key, type 2242/2260/2280/22110 storage devices support(SATA & PCIe 4.0 x4 mode) AMD RyzenTM 4000 G-Series Processor: 1 x M.2_1 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode)* AMD B550 Chipset: 1 x M.2_2 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode) 6 x SATA 6Gb/s port(s), Support Raid 0, 1, 10Source

USB & rear connections

2 items
USB ports and headers
Rear USB Port ( Total 8 ) 2 x USB 3.2 Gen 2 port(s)(1 x Type-A +1 x USB Type-C®) 4 x USB 3.2 Gen 1 port(s)(4 x Type-A) 2 x USB 2.0 port(s) Front USB Port ( Total 6 ) 2 x USB 3.2 Gen 1 port(s) 4 x USB 2.0 port(s)Source
Rear-panel ports
1 x Intel® I225-V 2.5Gb Ethernet 1 x DisplayPort 1 x HDMI 2 x USB 3.2 Gen 2 (1 x Type-A+1 x USB Type-C®) 4 x USB 3.2 Gen 1 2 x USB 2.0 1 x Optical S/PDIF out 1 x BIOS FlashBack™ Button(s) 5 x Gold-plated audio jacksSource

Networking

1 item
Network interfaces and requirements
Intel® I225-V 2.5Gb Ethernet ASUS LANGuardSource

Audio

1 item
Audio interfaces
ROG SupremeFX 8-Channel High Definition Audio CODEC S1220A - Dual OP Amplifiers - Impedance sense for front and rear headphone outputs - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - High quality 120 dB SNR stereo playback output and 113 dB SNR recording input - Supports up to 32-Bit/192kHz playback * Audio Feature: - SupremeFX Shielding™ Technology - Gold-plated jacks - Optical S/PDIF in port(s) at back panel - Audio Shielding - Premium Japanese audio capacitors - Audio Cover * Due to limitations in HDA bandwidth, 32-Bit/192kHz is not supported for 8-Channel audio.Source

Power, cooling & lighting

1 item
Internal headers and connectors
1 x CPU Fan connector(s) 1 x CPU OPT Fan connector(s) 3 x Chassis Fan connector(s) 1 x AIO_PUMP connector 1 x AAFP connector 2 x Aura RGB Strip Header(s) 1 x Addressable Gen 2 header(s) 1 x USB 3.2 Gen 1(up to 5Gbps) connector(s) support(s) additional 2 USB 3.2 Gen 1 port(s) 2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s) 1 x M.2 Socket 1 with M key, type 2242/2260/2280/22110 storage devices support(SATA & PCIe 4.0 x4 mode) 1 x M.2 Socket 2 with M key, type 2242/2260/2280/22110 storage devices support (SATA & PCIE 3.0 x 4 mode) 6 x SATA 6Gb/s connector(s) 1 x Thunderbolt header(s) 1 x 24-pin EATX Power connector(s) 1 x 8-pin ATX 12V Power connector(s) 1 x 4-pin ATX 12V Power connector(s) 1 x System panel(s) 1 x Thermal sensor connector(s) 1 x Clear CMOS jumper(s)Source

BIOS, software & diagnostics

2 items
CPU support and BIOS requirements
AMD AM4 Socket for AMD Ryzen™ 5000 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

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® 10 64-bitSource
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