Fast delivery within 72 Hours

Asus PRIME B840M-A-CSM AMD B840 AM5 Micro ATX 4 DDR5 HDMI 2 DP 2.5G LAN 3x M.2

Original price was: £174.26.Current price is: £164.26.

Socket AMD AM5
Chipset AMD B840
DDR Type DDR5
Form FactorMicro ATX

Shipping & Delivery

Courier delivery

Our courier will deliver to the specified address

2-3 Days

From £20

DHL Courier delivery

DHL courier will deliver to the specified address

2-3 Days

From £40

Warranty 1 year

More details

Free 30-Day returns

More details

Shipping & Delivery

Free delivery

Fast & Free Delivery to Your Door

2-3 Days

Royal Mail delivery

Delivered Safely via Royal Mail

1 Day

From £4.99

Payment Methods:

Description

Product Description

ASUS PRIME B840M-A-CSM Ultimate Performance Micro-ATX Motherboard

Engineered for Ryzen Performance

The ASUS PRIME B840M-A-CSM is built to support AMD Ryzen™ 9000, 8000, and 7000 Series processors using the powerful AMD B840 chipset and AM5 socket. With support for blazing-fast DDR5 RAM (up to 7600+ MT/s OC), dual PCIe 4.0 x4 M.2 slots, and high-bandwidth PCIe 4.0 graphics, this motherboard is ideal for handling heavy workloads, high-end gaming, and AI applications. Realtek 2.5Gb Ethernet provides ultra-reliable, high-speed networking, while BIOS FlashBack™ allows seamless BIOS updates without a CPU or memory installed.

Advanced Cooling and Expansion Options

Cooling is handled with precision thanks to dedicated VRM and PCH heatsinks and ASUS Fan Xpert 2+ for granular fan control. A pre-mounted I/O shield and Q-LED Core diagnostics simplify installation and troubleshooting, while SafeSlot Core+ ensures GPU slot durability. Expand your storage with three M.2 slots (PCIe 4.0 and 3.0) and four SATA ports, with full RAID support under RAIDXpert2. Rear and front USB Type-C® ports (5Gbps), plus multiple USB 10Gbps and 2.0 ports, provide comprehensive device connectivity.

Custom Lighting and Commercial Features

Personalize your build with ASUS Aura Sync RGB and three addressable Gen 2 headers for synchronized lighting effects. ASUS GlideX and Armoury Crate software enhance control and system monitoring. With CSM support for long-term commercial deployment, a 36-month lifecycle, and ASUS Control Center Express for IT management, this board is also ideal for business. The ASUS PRIME B840M-A-CSM expertly blends power, cooling, expandability, and ease of use for professionals and gamers alike.

Description	Specification
Motherboard Type	Desktop
Form Factor	Micro ATX
Socket	AMD AM5
Chipset	AMD B840
DDR Type	DDR5
CPU Support	Click here for CPU support
RAM Technology	DDR5 (Dual Channel), ECC and Non-ECC Un-buffered DIMM, Supports AMD EXPO, ASUS AEMP Non-ECC, un-buffered DDR5 memory supports On-Die ECC function
RAM Slots	4 x DIMM
RAM Speeds	Up to 7600+MT/s (OC)
Maximum Memory	256GB
Graphics	Integrated Graphics* *Graphics specifications may vary between CPU types
Graphics Ports	1 x HDMI 2 x Display Port
PCI/PCI Express	Ryzen 9000 & 7000 Series CPUs: 1 x PCIe 4.0 x16 (supports x16 mode)Ryzen 8000 Series CPUs: 1 x PCIe 4.0 x16 (supports x8/x4 mode)AMD B840 Chipset: 2 x PCIe 3.0 x16 (support x1 mode)
Storage	4 x SATA III 3 x M.2Ryzen 9000 & 7000 Series CPUs: M.2_1 (2280) – PCIe 4.0 x4 M.2_2 (2242/2260/2280) – PCIe 4.0 x4Ryzen 8000 Series CPUs: M.2_1 (2280) – PCIe 4.0 x4 M.2_2 (2242/2260/2280) – PCIe 4.0 x4/x2AMD B840 Chipset: M.2_3 (2280) – PCIe 3.0 x4
RAID	AMD RAIDXpert2 Technology Ryzen 9000 Series Processors: RAID 0/1/5/10 Ryzen 8000 Series Processors: RAID 0/1 Ryzen 7000 Series Processors: RAID 0/1/10
Wireless	–
LAN	2.5GB LAN
Audio	Realtek 7.1 Surround Sound High Definition Audio CODEC
USB Ports Supported	Rear: 2 x USB 10Gbps Type-A 1 x USB 5Gbps Type-C 4 x USB 2.0Front: 1 x USB 5Gbps Type-C 2 x USB 5Gbps 4 x USB 2.0
Back Panel I/O Ports	2 x USB 10Gbps Type-A 1 x USB 5Gbps Type-C 4 x USB 2.0 2 x Display Port 1 x HDMI 1 x Realtek 2.5Gb Ethernet 3 x Audio jacks 1 x BIOS FlashBack button
Internal I/O Connectors	1 x 4-pin CPU Fan 1 x 4-pin CPU OPT Fan 2 x 4-pin Chassis Fan 1 x 24-pin Main 1 x 8-pin +12V CPU 3 x M.2 (Key M) 4 x SATA 6Gb/s 1 x USB 5Gbps Type-C 1 x USB 5Gbps 2 x USB 2.0 3 x Addressable Gen2 1 x Clear CMOS 1 x COM Port 1 x Front Panel Audio 1 x S/PDIF Out 1 x SPI TPM (14-1 pin) 1 x 10-1 pin Front Panel System
Accessories	2 x SATA 6Gb/s cables 1 x M.2 rubber package 2 x Screw packages for M.2 SSD 1 x ACC Express Activation Key Card 1 x Quick start guide
Package Type	Retail
Package Weight	1.4500 kg
Warranty	3 Years