ASUS PRIME B850M-A-CSM
AM5, AMD B850, mATXMore than 10 pieces in stock at third-party supplier
Product details
The ASUS MB PRIME B850M-A-CSM 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, alloy chokes and long-life capacitors, this motherboard ensures stable performance. Ultra-fast connectivity is ensured by PCIe 5.0 x16 and M.2 slots as well as Realtek 2.5Gb Ethernet and USB 10Gbps ports. In addition, the board offers comprehensive cooling options and a DIY-friendly design that facilitates installation and customisation. Customisation is supported by addressable Gen 2 headers with ASUS Aura Sync RGB lighting, allowing for system customisation. ASUS' renowned software ensures easy management and monitoring of the system.
- Compatible with AMD Ryzen 9000, 8000 and 7000 Series processors
- Improved 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-assembled 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 |
Product Safety | |
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 |
Memory chip | DDR5 SDRAM |
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 |
Ethernet controller | Gigabit Ethernet |
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) |
Power connectors | 24-pin EATX, 8-pin ATX 12V |
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
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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.MSI2,5 %
- 2.Gigabyte2,6 %
- 3.ASUS2,7 %
- 4.AsRock2,8 %
- 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- 2.AsRock3 days
- 2.MSI3 days
- 4.NZXT6 days
- 5.ASUS8 days
- 6.Gigabyte9 days
Return rate
How often is a product of this brand in the «Motherboards» category returned?
Source: Galaxus- 1.MSI4,5 %
- 2.Gigabyte4,7 %
- 3.ASUS4,8 %
- 4.AsRock5,9 %
- 4.NZXT5,9 %