Name: ASUS B840M-K AMD Motherboard - DDR5, Micro ATX - Up to 128GB RAM
Brand: ASUS

ASUS B840M-K AMD Motherboard - DDR5, Micro ATX brings a compact yet powerful platform for modern AMD builds, fully compatible with Socket AM5 processors from the Ryzen 7000, 8000 and 9000 series.

This micro ATX motherboard uses the AMD B840 chipset and supports DDR5-SDRAM in two DIMM slots, offering dual-channel memory up to 128 GB and compatibility with both ECC and non-ECC unbuffered memory for improved stability and performance.

Storage versatility is excellent on the ASUS B840M-K, with two M.2 slots and four SATA III connectors that together support up to six drives (HDD & SSD). Hardware RAID (0, 1, 5, 10) is supported for data redundancy and performance arrays.

Expansion options include one PCIe x16 Gen4 slot and one PCIe x16 Gen3 slot, plus legacy connectivity such as a COM connector. The board also features abundant headers: three chassis fan connectors, CPU fan connector, TPM header, 24-pin ATX and 8-pin EPS power connectors, and three RGB LED pin headers for simple case lighting.

Rear I/O provides modern networking and multimedia: a 2.5 Gigabit Ethernet (RJ-45) port, HDMI output, S/PDIF out and multiple USB ports including USB 3.2 Gen1 Type-A. Onboard audio supports up to 7.1 channels, and Windows 10 x64 / Windows 11 are supported via the UEFI AMI BIOS (256 Mbit).

The board’s compact 244 x 221 mm micro ATX form factor and solid black aesthetic make it suitable for small desktops, home labs and budget gaming rigs that need high-speed DDR5 memory and reliable storage options.

Use cases: build a quiet home workstation for content creation, assemble a small-form gaming PC with fast NVMe storage, or deploy a compact office machine with RAID-protected storage. Key selling points include Socket AM5 support for current and future Ryzen series CPUs, DDR5 up to 128 GB, two M.2 slots, 2.5 GbE networking and hardware RAID capability.