The ASUS MB PRIME B850M-A WIFI is an advanced motherboard designed specifically for the demands of modern AI applications. It supports the AMD AM5 socket and is compatible with the latest AMD Ryzen 9000, 8000 and 7000 Series desktop processors. With an improved power supply solution based on a 6-layer PCB and including alloy chokes and long-life capacitors, this motherboard ensures stable performance. Ultra-fast connectivity is supported by Wi-Fi 6E, PCIe 5.0 x16 and M.2 slots as well as Realtek 2.5Gb Ethernet, making it ideal for demanding applications. In addition, the board offers comprehensive cooling capabilities and a DIY-friendly design that facilitates installation and customisation. The possibility of personalisation through addressable Gen 2 headers with ASUS Aura Sync RGB lighting completes the overall package.
Mainboard features | S/PDIF header, Serial header, Trusted Platform Module |
Wireless transmission | Bluetooth, Wi-Fi |
Number of memory modules (RAM) | 4x |
Internal connection options | M.2 PCIe (3x), S-ATA III (4x) |
Item number | 57493479 |
Manufacturer | ASUS |
Category | Motherboards |
Manufacturer no. | 90MB1LN0-M0EAY0 |
Release date | 8.4.2025 |
Sales rank in Category Motherboards | 345 of 1030 |
Form factor | Micro ATX (mATX) |
Socket | AM5 |
Chipset | AMD B850 |
Mainboard features | S/PDIF header, Serial header, Trusted Platform Module |
Operating system compatibility | Windows |
BIOS type | UEFI AMI |
Wireless transmission | Bluetooth, Wi-Fi |
Wi-Fi standard | Wi-Fi 1 / 802.11b, Wi-Fi 2 / 802.11a, Wi-Fi 3 / 802.11g, Wi-Fi 4 / 802.11n, Wi-Fi 5 / 802.11ac, Wi-Fi 6 / 802.11ax |
Memory form factor | DIMM |
Number of memory modules (RAM) | 4x |
Max. memory (RAM) | 256 GB |
Memory chip | DDR5-5200 |
Max. RAM OC | 8000 MHz |
Transfer rate | 8000 MT/s |
RAM buffer | Unbuffered |
Video connections | DisplayPort (2x), HDMI (1x) |
Network connections | RJ45 2.5 Gigabit Ethernet (1x) |
Ethernet controller brand | Realtek |
Max. port speed | 2.50 Gbit/s |
RAID configuration | 0, 1, 10 |
Internal connection options | M.2 PCIe (3x), S-ATA III (4x) |
Expansion slot | PCI Express x16 (Gen 4) (1x), PCI Express x16 (Gen 5) (1x) |
PCI express version (max.) | 5 |
Number of fan connector | 3 |
USB ports | USB-A |
Exact USB ports | USB-A 2.0 (4x), USB-A 3.2 Gen 1 (2x), USB-A 3.2 Gen 2 (2x) |
Power connectors | 24-pin ATX, 8-pin PCI-E |
Country of origin | China, Germany, Taiwan |
Manufacturer commitment | RE100, SBTi |
CO₂ emissions | 1425.76 kg |
Climate contribution | CHF 7.65 |
Scope of delivery | 1 piece |
Length | 244 mm |
Width | 244 mm |
Height | 50 mm |
Weight | 930 g |
Length | 28 cm |
Width | 27.50 cm |
Height | 8 cm |
Weight | 1.41 kg |
How often does a product of this brand in the «Motherboards» category have a defect within the first 24 months?
Source: Digitec GalaxusHow 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: Digitec GalaxusHow often is a product of this brand in the «Motherboards» category returned?
Source: Digitec Galaxus
The Asus Prime B840M-A WIFI is the cheapest board (150 euros) tested and the only one equipped with the B840 chipset. However, it doesn't have to hide behind the other candidates in terms of features: It can control three high-resolution displays simultaneously via HDMI 2.1 and two Display 1.4 outputs...