ASUS PRIME B840M-K AMD B840 Socket AM5 micro ATX
AMD Socket AM5 AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. PC micro ATX AMD B840 7.1 channels. DDR5-SDRAM 2 DIMM Maximum internal memory: 128 GB. HDD & SSD M.2, SATA III RA...
Compare prices
At a Glance
Key highlights and verified hardware specifications
Price History
1 verified storeSelling your phone?
Top alternatives to consider
View all alternatives >These recommendations include other storage sizes, colors, and closely matched editions of this exact product so you can easily compare pricing across available options.





Products you might be interested in
View more in computer components storage >Trending items in the same category to help you discover popular alternatives other shoppers are considering.




Ask the community
About ASUS PRIME B840M-K AMD B840 Socket AM5 micro ATX
AMD Socket AM5 AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. PC micro ATX AMD B840 7.1 channels. DDR5-SDRAM 2 DIMM Maximum internal memory: 128 GB. HDD & SSD M.2, SATA III RAID support Number of storage drives supported: 6. BIOS type: UEFI AMI 256 Mbit. 2.5 Gigabit Ethernet. B840M-K. ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B840M-K motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It’s designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.. Processor. Processor manufacturer. AMD. Processor socket. Socket AM5. Compatible processor series. AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. Supported processor sockets. Socket AM5. Memory. Supported memory types. DDR5-SDRAM. Number of memory slots. 2. Memory slots type. DIMM. Memory channels. Dual-channel. ECC сompatibility. ECC & Non-ECC. Maximum internal memory. 128 GB. Unbuffered memory. Yes. Storage controllers. Supported storage drive types. HDD & SSD. Supported storage drive interfaces. M.2, SATA III. Number of storage drives supported. 6. Number of HDDs supported. 4. RAID support. Yes. RAID levels. 0, 1, 5, 10. Graphics. Parallel processing technology support. Not supported. Internal I/O. USB 2.0 connectors. 2. USB 3.2 Gen 1 (3.1 Gen 1) connectors. 2. Number of SATA III connectors. 4. S/PDIF out connector. Yes. Front panel audio connector. Yes. Front panel connector. Yes. ATX Power connector (24-pin). Yes. CPU fan connector. Yes. Number of chassis fan connectors. 3. EPS power connector (8-pin). Yes. 12V power connector. Yes. TPM connector. Yes. Number of COM connectors. 1. RGB LED pin header. Yes. Number of RGB LED pin headers. 3. Rear panel I/O ports. USB 2.0 ports quantity. 2. USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity. 4. Ethernet LAN (RJ-45) ports. 1. HDMI ports quantity. 1. Network. Ethernet LAN. Yes. Ethernet interface type. 2.5 Gigabit Ethernet. Wi-Fi. No. Top Wi-Fi standard. Not available. Features. Component for. PC. Motherboard form factor. micro ATX. Motherboard chipset family. AMD. Motherboard chipset. AMD B840. Audio output channels. 7.1 channels. Product colour. Black. Windows operating systems supported. Windows 10 x64, Windows 11. Expansion slots. PCI Express x16 (Gen 4.x) slots. 1. PCI Express x16 (Gen 3.x) slots. 1. Number of M.2 (M) slots. 2. BIOS. BIOS type. UEFI AMI. BIOS memory size. 256 Mbit. Packaging data. Package width. 270 mm. Package depth. 263 mm. Package height. 51.5 mm. Package weight. 1.02 kg. Weight & dimensions. Width. 244 mm. Depth. 221 mm. Packaging content. Screws included. Yes. Cables included. SATA
