ASUS PRIME B840M-K Motherboard
AM5, AMD B840, ATX, mATX10 pieces in stock at supplier
Product details
B840M-K
The ASUS Prime series motherboards have been expertly designed to fully utilize the potential of AMD Ryzen 9000 series processors. The PRIME B840M-K motherboard offers users and PC DIY builders a range of performance optimizations through intuitive software and firmware features. It has been developed as "Advanced AI PC-ready" and provides the necessary power and connectivity for demanding AI applications.
Mainboard features | Front panel audio connector, Trusted Platform Module |
Number of memory modules (RAM) | 2x |
Memory type | DDR5 RAM |
Internal connection options | M.2 (2x), S-ATA III (4x) |
Item number | 66563978 |
Manufacturer | ASUS |
Category | Motherboards |
Manufacturer no. | 90MB1PK0-M0EAY0 |
Release date | 2/2/2026 |
External links |
Form factor | ATX, Micro ATX (mATX) |
Socket | AM5 |
Chipset | AMD B840 |
Mainboard features | Front panel audio connector, Trusted Platform Module |
Operating system compatibility | Windows, Windows 10 |
BIOS type | UEFI AMI |
Memory form factor | DIMM |
Number of memory modules (RAM) | 2x |
Max. memory (RAM) | 128 GB |
Memory chip | DDR5 SDRAM |
Memory type | DDR5 RAM |
RAM buffer | Error Correcting Code, Unbuffered |
Video connections | HDMI (1x) |
Network connections | RJ45 (1x) |
Max. port speed | 2.50 Gbit/s |
Audio channel | 7.1 Channel |
RAID configuration | 0, 1, 10, 5 |
Internal connection options | M.2 (2x), S-ATA III (4x) |
Expansion slot | PCI Express x16 (Gen 3) (1x), PCI Express x16 (Gen 4) (1x) |
PCI express version (max.) | 4 |
USB ports | USB-A |
Exact USB ports | USB-A 2.0 (2x), USB-A 3.2 Gen 1 (4x) |
Power connectors | 24-pin ATX |
Country of origin | China, Taiwan |
CO₂ emissions | 95,84 kg |
Climate contribution | EUR 2,40 |
Scope of delivery | SATA cable |
Length | 221 mm |
Width | 244 mm |
Height | 51.50 mm |
Weight | 1020 g |
Product Safety |
30-day right of return
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Reviews & Ratings
Statutory warranty score
How often does a product of this brand in the «Motherboards» category have a defect within the first 24 months?
Source: Galaxus- 1.MSI2,4 %
- 2.ASUS2,5 %
- 3.Gigabyte2,6 %
- 4.AsRock2,9 %
- 5.Supermicro3,2 %
Statutory warranty case duration
How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?
Source: Galaxus- 1.AsRock5 days
- 2.MSI6 days
- 3.ASUS7 days
- 4.Gigabyte9 days
Return rate
How often is a product of this brand in the «Motherboards» category returned?
Source: Galaxus- 1.MSI4,8 %
- 2.Gigabyte5 %
- 3.ASUS5,1 %
- 4.AsRock5,9 %
- 5.Biostar7,8 %