Key Specifications
Choose one or multiple features to search for items that have the same specifications.| Processor | |
| Processor manufacturer | AMD |
| Compatible processor series | AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor socket | AM5 |
| Supported processor sockets | Socket AM5 |
| Memory | |
| Maximum internal memory | 128 GB |
| ECC | ![]() |
| Non-ECC | ![]() |
| Supported memory types | DDR5 |
| Memory channels | Dual-channel |
| Unbuffered memory | ![]() |
| Memory slots type | DIMM |
| Number of memory slots | 2 |
| Supported memory clock speed (max) | 8000 MHz |
| ECC сompatibility | ECC & Non-ECC |
| Weight & dimensions | |
| Width | 244 mm |
| Depth | 221 mm |
| Networking | |
| Ethernet LAN | ![]() |
| Bluetooth | ![]() |
| Wi-Fi | ![]() |
| Ethernet interface type | 2.5 Gigabit Ethernet |
| Internal I/O | |
| USB 2.0 connectors | 2 |
| S/PDIF out connector | ![]() |
| CPU fan connector | ![]() |
| Number of COM connectors | 1 |
| ATX Power connector (24-pin) | ![]() |
| Number of chassis fan connectors | 3 |
| Front panel audio connector | ![]() |
| TPM connector | ![]() |
| EPS power connector (8-pin) | ![]() |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| Number of SATA III connectors | 4 |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors | 0 |
| Front panel connector | ![]() |
| 12V power connector | ![]() |
| RGB LED pin header | ![]() |
| Number of RGB LED pin headers | 3 |
| Back panel I/O ports | |
| USB 2.0 ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 1 |
| VGA (D-Sub) ports quantity | 0 |
| DVI-D ports quantity | 0 |
| HDMI ports quantity | 1 |
| HDMI version | 2.1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 0 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 0 |
| Storage controllers | |
| RAID levels | 0/1/5/10 |
| Number of HDDs supported | 4 |
| RAID support | ![]() |
| Number of storage drives supported | 6 |
| Supported storage drive types | HDD & SSD |
| Supported storage drive interfaces | M.2, SATA III |
| Packaging data | |
| Package weight | 1.02 kg |
| Package depth | 263 mm |
| Package height | 51.5 mm |
| Package width | 270 mm |
| Packaging content | |
| Cables included | SATA |
| Screws included | ![]() |
| Expansion slots | |
| PCI Express x16 slots | 3 |
| PCI Express x16 (Gen 3.x) slots | 1 |
| Number of M.2 (M) slots | 2 |
| PCI Express x16 (Gen 4.x) slots | 2 |
| BIOS | |
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |
| Clear CMOS button | ![]() |
| Graphics | |
| Parallel processing technology support | Not supported |
| Features | |
| Motherboard chipset | AMD B840 |
| Motherboard form factor | Mini ITX |
| Product colour | Black |
| Audio output channels | 7.1 channels |
| Windows operating systems supported | Windows 10 x64, Windows 11 |
| Motherboard chipset family | AMD |
| Component for | PC |
| Product type | Motherboard |
| EAN | 4711636435048 |
The ASUS PRIME B840M-K is a micro-ATX motherboard engineered for AMD's AM5 socket, providing compatibility with Ryzen 7000, 8000, and 9000 series processors. Based on the AMD B840 chipset, this board offers a stable foundation for compact PC builds intended for everyday computing and productivity. Its design incorporates hardware safeguards through the ASUS 5X PROTECTION III suite and provides thermal management options with dedicated CPU and chassis fan connectors. The power delivery system is configured to support the specified processors under standard workloads.
This motherboard features two DIMM slots supporting up to 128 GB of dual-channel DDR5 memory, with compatibility for both ECC and non-ECC unbuffered modules. For data storage, it includes two M.2 slots for PCIe 4.0 NVMe drives and four SATA 6 Gb/s ports, which can be configured in RAID 0, 1, 5, or 10 arrays. Network connectivity is provided by a 2.5 GbE controller for a high-speed wired connection. The rear I/O offers a mix of USB 3.2 Gen 1 and USB 2.0 ports, while an internal Addressable Gen 2 header allows for basic RGB lighting customization.
Key Features:- Micro-ATX form factor
- Supports AMD Ryzen 7000, 8000, and 9000 Series processors
- Utilizes the AMD AM5 processor socket
- Features the AMD B840 chipset
- 2x DDR5 DIMM slots support up to 128 GB
- Equipped with 2x M.2 PCIe 4.0 and 4x SATA 6Gb/s storage ports
- Includes 1x 2.5 Gigabit Ethernet port
- Provides rear panel USB-A and USB-C connectors
- Offers 1x HDMI 2.1 port for video output
- Integrated with Realtek 7.1 HD Audio
- Includes two PCIe 4.0 x16 slots and one PCIe 3.0 x16 slot for expansion
Estimated delivery: 24.03 - 30.03
Today: Closed
Estimated delivery: 24.03 - 30.03
Today: Closed
Estimated delivery: 24.03 - 30.03
Today: Closed
Estimated delivery: 24.03 - 30.03
Today: Closed
Estimated delivery: 24.03 - 30.03
Today: Closed
Estimated delivery time: 24.03 - 30.03
Estimated delivery time: 24.03 - 29.03
Estimated delivery time: 25.03 - 30.03
Estimated delivery time: 25.03 - 30.03
Estimated delivery time: 25.03 - 29.03
Estimated delivery time: 24.03 - 30.03
Estimated delivery time: 24.03 - 30.03
Estimated delivery time: 25.03 - 29.03


