The ASUS PRIME B840M-K is a compact micro-ATX motherboard designed for AMD Ryzen 9000, 8000, and 7000 Series processors on the AM5 platform. Powered by the AMD B840 chipset, it delivers dependable performance for gaming, office productivity, and mainstream PC builds while maintaining efficient thermal management and stable power delivery. Built with ASUS 5X Protection III technologies, SafeSlot Core+ reinforcement, stainless-steel rear I/O, and optimized VRM cooling, it provides reliable long-term durability for modern systems.
This motherboard supports DDR5 memory up to 8000+ MT/s overclocked speeds with AMD EXPO and ASUS Enhanced Memory Profile technologies for optimized performance. It also features dual PCIe 4.0 M.2 slots for fast NVMe SSD storage, Realtek 2.5Gb Ethernet connectivity, USB 5Gbps Type-C front panel support, Aura Sync RGB lighting compatibility, and ASUS-exclusive Q-Design features such as Q-DIMM and Q-Slot for easier installation and upgrades. Its micro-ATX layout makes it ideal for compact gaming and workstation builds with modern connectivity and storage expansion.
Specifications
Specifications
Details
Model
ASUS PRIME B840M-K
CPU Socket
AMD AM5
Chipset
AMD B840
Supported Processors
AMD Ryzen 9000 / 8000 / 7000 Series
Memory Support
2 x DDR5 DIMM, Dual Channel
Maximum Memory
Up to 128GB DDR5
Memory Speed
Up to 8000+ MT/s (OC)
Expansion Slots
1 x PCIe 4.0 x16, 1 x PCIe 3.0 x16 (x4 mode)
M.2 Slots
2 x M.2 PCIe 4.0 x4
SATA Ports
4 x SATA 6Gb/s
LAN
Realtek 2.5Gb Ethernet (ASUS LANGuard)
Wireless
None
Display Outputs
1 x HDMI 2.1
USB
4 x USB 5Gbps Type-A, USB Type-C front header, USB 2.0
Audio
Realtek 7.1 Surround High Definition Audio
Special Features
ASUS 5X Protection III, Aura Sync, Q-DIMM, Q-Slot, SafeSlot Core+
Cooling
VRM Heatsink Design, Fan Xpert 2+
Form Factor
Micro-ATX
Reviews
Delivery
We offer free delivery to Dubai, Abu Dhabi, Al Ain, Sharjah, Ajman, Ras Al Khaimah, Fujairah, Umm Al Quwain, UAE for ASUS PRIME B840M-K | AM5 mATX Motherboard. Delivery available to Saudi Arabia, Oman, Qatar, Kuwait, and Bahrain.