ASUS MB PRIME B850M-A-CSM
AM5, AMD B850, mATXMore than 10 pieces in stock at supplier
Product details
The ASUS MB PRIME B850M-A-CSM is an advanced motherboard specifically designed to meet 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 enhanced power solution based on a 6-layer PCB, alloy chokes, and durable capacitors, this motherboard ensures stable performance. Ultra-fast connectivity is provided through PCIe 5.0 x16 and M.2 slots, as well as Realtek 2.5Gb Ethernet and USB 10Gbps ports. Additionally, the board offers comprehensive cooling options and a DIY-friendly design that facilitates installation and customization. Personalization is supported by addressable Gen 2 headers with ASUS Aura Sync RGB lighting, allowing for individual system design. ASUS's renowned software ensures easy management and monitoring of the system.
- Compatible with AMD Ryzen™ 9000, 8000, and 7000 Series processors
- Enhanced power supply with 6-layer PCB and durable components
- PCIe 5.0 for ultra-fast data transfer
- Comprehensive cooling options with VRM and M.2 heatsinks
- DIY-friendly design with pre-mounted I/O shield and BIOS FlashBack™.
Processor family | Ryzen 7th Gen, Ryzen 8th Gen, Ryzen 9th Gen |
Memory type | DDR5 RAM |
Number of memory modules (RAM) | 4 x |
Internal connection options | M.2 PCIe (3x), S-ATA III (4x), USB 2.0 Header (2x) |
Mainboard features | S/PDIF header, Serial header, Trusted Platform Module |
Item number | 57493474 |
Manufacturer | ASUS |
Category | Motherboards |
Manufacturer no. | 90MB1LQ0-M0EAYC |
Release date | 8-4-2025 |
Form factor | Micro ATX (mATX) |
Socket | AM5 |
Chipset | AMD B850 |
Mainboard features | S/PDIF header, Serial header, Trusted Platform Module |
Operating system compatibility | Windows 10 |
BIOS type | UEFI AMI |
Processor family | Ryzen 7th Gen, Ryzen 8th Gen, Ryzen 9th Gen |
Memory form factor | DIMM |
Number of memory modules (RAM) | 4 x |
Max. memory (RAM) | 256 GB |
Max. RAM OC | 8000 MHz |
Supported memory speed | 8000 MHz |
Memory type | DDR5 RAM |
RAM buffer | Unbuffered |
Video connections | DisplayPort (2x), HDMI (1x) |
Video connection version | Display port 1.4, HDMI 2.1 |
Network connections | RJ45 2.5 Gigabit Ethernet (1x) |
Ethernet controller brand | Realtek |
Max. port speed | 2.50 Gbit/s |
Audio channel | 7.1 Channel |
RAID configuration | 0, 1, 10, 5 |
Internal connection options | M.2 PCIe (3x), S-ATA III (4x), USB 2.0 Header (2x) |
Expansion slot | PCI Express x16 (3x) |
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) |
Country of origin | China, Taiwan |
Manufacturer commitment | RE100, SBTi |
Manufacturer compensation | According to RE100, the manufacturer ASUS fully compensates for its energy consumption, leading to a reduction in emissions. |
CO₂-Emission | |
Climate contribution |
Scope of delivery | - SATA cable, Screws |
Length | 244 mm |
Width | 244 mm |
Weight | 1450 g |
Product Safety |
30-day right of return
Compare products
Goes with
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- 2.Gigabyte2,7 %
- 3.AsRock2,8 %
- 3.ASUS2,8 %
- 5.Supermicro3,1 %
- 6.NZXT4,6 %
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- 2.Supermicro2 days
- 4.MSI3 days
- 5.Gigabyte7 days
- 6.ASUS9 days
- 6.NZXT9 days
Return rate
How often is a product of this brand in the «Motherboards» category returned?
Source: Galaxus- 1.MSI4,7 %
- 2.ASUS4,9 %
- 3.Gigabyte5 %
- 4.NZXT5,5 %
- 5.AsRock6 %