ASUS PRIME B840M-A-CSM | AM5 Socket | AMD B840 Chipset | DDR5 256GB | PCIe 4.0 – New

R2,171.48

Your AMD Ryzen Build Starts Here

The ASUS PRIME B840M-A-CSM gives you a rock-solid foundation for your next AMD Ryzen build. Compatible with Ryzen 7000, 8000, and 9000 Series processors, it delivers the performance headroom gamers and creators need — without compromise.

PCIe 4.0 Speed, No Bottlenecks

With a PCIe 4.0 x16 slot, your GPU and NVMe SSD get double the bandwidth of the previous generation. Whether you’re loading into a game or rendering a project, fast data throughput means less waiting and more doing.

Built for Builders Who Mean Business

ASUS has loaded this board with DIY-friendly features like SafeSlot Core+ for a secure graphics card fit, Q-LED Core for instant fault diagnosis, and BIOS FlashBack so you can update your firmware without a CPU installed. Building a PC has never been this straightforward.

Connectivity That Keeps Up With You

From Realtek 2.5G Ethernet for lag-free online gaming to USB Type-C front and rear ports, plus Realtek 7.1 Surround Sound audio, this Micro ATX board keeps all your peripherals and devices running at full speed.

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SKU: PRIME B840M-A-CSM Categories: , , Tags: , , , ,
Description
Tech Specs
Performance
CPU Socket
AMD Socket AM5
Supported Processors
AMD Ryzen™ 9000, 8000 & 7000 Series Desktop Processors
Chipset
AMD B840
Operating System
Windows 11, Windows 10 64-bit
Memory
Memory Slots
4 x DIMM slots
Memory Type
DDR5, Dual Channel
Max Memory
256GB
Memory Speed
Up to 7600+ MT/s (OC) with Ryzen™ 9000, 8000 & 7000 Series
Memory Profiles
AMD EXPO™, ASUS Enhanced Memory Profile (AEMP)
Expansion & Storage
PCIe Slots
1 x PCIe 4.0 x16 (x16 mode for Ryzen 9000/7000; x8/x4 for Ryzen 8000); 2 x PCIe 3.0 x16 (x1 mode, from B840 Chipset)
M.2 Slots
3 x M.2 slots: M.2_1 (PCIe 4.0 x4, type 2280), M.2_2 (PCIe 4.0 x4, type 2242/2260/2280), M.2_3 (PCIe 3.0 x4, type 2280)
SATA Ports
4 x SATA 6Gb/s
RAID
AMD RAIDXpert2: RAID 0/1/5/10 (Ryzen 9000); RAID 0/1 (Ryzen 8000); RAID 0/1/10 (Ryzen 7000)
Display
Display Outputs
2 x DisplayPort 1.4 (supports up to 8K@30Hz), 1 x HDMI 2.1 (supports up to 4K@60Hz)
Connectivity
Ethernet
1 x Realtek 2.5Gb Ethernet with ASUS LANGuard
Rear USB Ports
2 x USB 10Gbps (Type-A), 1 x USB 5Gbps (Type-C), 4 x USB 2.0 (Type-A)
Front USB Headers
1 x USB 5Gbps Type-C connector, 1 x USB 5Gbps header (2 additional ports), 2 x USB 2.0 headers (4 additional ports)
Audio
Realtek 7.1 Surround Sound HD Audio CODEC, up to 24-Bit/192kHz, 3 x audio jacks; Audio Shielding, premium capacitors, dedicated PCB layers
Design
Form Factor
Micro ATX
RGB Lighting
Aura Sync support for full RGB lighting control
Cooling
Multiple heatsinks, ASUS Fan Xpert 2+ with multiple fan headers
DIY Features
SafeSlot Core+, Q-LED Core, BIOS FlashBack™, pre-mounted I/O shield
In the Box
Motherboard x1, SATA Cables x2, M.2 rubber package x1, Screw Package for M.2 SSD x2, Quick Start Guide x1
Additional information
Weight 1.351 kg
Dimensions 28 × 28 × 7 cm
Brand

ASUS

Colour

Black

Warranty

36 Months