- Available from 2026-11-24 — contact us to reserve
ASUS PRIME B840M-K AMD B840 Socket AM5 micro ATX
€145.50
Including €0.06 for ecotax
Tax included
ASUS PRIME B840M-K, AMD, Socket AM5, AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series, Socket AM5, DDR5-SDRAM, 128 GB
Delivery policy
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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.
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.
Technical specifications
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 HDDs supported | 4 |
| Number of storage drives supported | 6 |
| 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 |
| Number of COM connectors | 1 |
| TPM connector | Yes |
| 12V power connector | Yes |
| 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
| Motherboard chipset | AMD B840 |
|---|---|
| Audio output channels | 7.1 channels |
| Product colour | Black |
| Component for | PC |
| Motherboard form factor | micro ATX |
| Motherboard chipset family | AMD |
| Windows operating systems supported | Windows 10 x64, Windows 11 |
Expansion slots
| PCI Express x16 (Gen 3.x) slots | 1 |
|---|---|
| PCI Express x16 (Gen 4.x) slots | 1 |
| Number of M.2 (M) slots | 2 |
BIOS
| BIOS type | UEFI AMI |
|---|---|
| BIOS memory size | 256 Mbit |
Weight & dimensions
| Width | 244 mm |
|---|---|
| Depth | 221 mm |
FL139822105
7 Items
Data sheet
- Colour
- Noir
- Processor brand
- AMD
- For
- PC
- Socket
- Emplacement AM5
- Memory type
- DDR5-SDRAM
- Memory form factor
- DIMM
Specific References
- EAN13
- 4711636435048
- MPN
- 90MB1PK0-M0EAY0
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ASUS PRIME B840M-K, AMD, Socket AM5, AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series, Socket AM5, DDR5-SDRAM, 128 GB