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ASUS PRIME B850M-A-CSM
Micro ATX Socket AM5 motherboard AMD B850 - 4x DDR5 - M.2 PCIe 5.0 - USB 3.1 - PCI-Express 5.0 16x - LAN 2.5 GbE
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ASUS PRIME B850M-A-CSM
Based on the AMD B850 chipset, the ASUS PRIME B850M-A-CSM motherboard is designed to accommodate AMD Ryzen 7000/8000/9000 processors on socket AM5. It is ideal for assembling a gaming or multimedia configuration. More affordable than a motherboard with an X870 chipset, it supports DDR5, PCI-Express 5.0 graphics cards and PCIe 5.0 M.2 SSDs, and comes with full connectivity, including 2.5 GbE LAN and USB 3.1.
ASUS PRIME B850M-A-CSM
- Socket AMD AM5 for AMD Ryzen 7000/8000/9000 processor
- 4 Dual-ChannelDDR5 8000 MHz (O.C.) memory slots
- 1 PCI-Express 5.0 16x* slot + 1 PCI-Express 4.0 16x slot (x4)
- 1 x M.2 PCIe 5.0 x4* + 2 x M.2 PCIe 4.0 x4 + 4 x SATA 6Gbps
- Audio 7.1 Surround Realtek
- Realtek 2.5 GbE LAN network
- Full cooling: PCH heatsink and Xpert 2+ fan
- Aura Sync RGB lighting: Integrated Gen 2 addressable connectors for LED strips, easily synchronised with Aura Sync-compatible hardware
Gaming in the best conditions
The high frequencies of AMD Ryzen processors are a real advantage when it comes to gaming. Choose the right components and design a super-powerful Gaming PC, with no latency and ready to serve when you need it. Get the edge over your opponents and reach new heights with AMD Ryzen 9000/8000/7000 processors and AMD AM5 motherboards.
The AMD Ryzen 9000 processors deliver performance in every area. They will enable you to create faster, achieve your objectives more quickly and save time all the time. From 3D rendering to exporting large video files, design, deliver and get the job done with PCIe 5.0 speed and storage, multiple processing threads and dedicated video accelerators.
Select your criteria
General information |
Product name |
ASUS PRIME B850M-A-CSM |
Brand |
ASUS | |
Model |
90MB1LQ0-M0EAYC | |
Processor |
Processor support |
AMD AM5 |
Number of CPUs supported |
1 | |
Chipset |
Chipset |
AMD B850 |
Memory |
Memory format |
4 X DIMM 288 pins (DDR5) |
Memory Frequency(ies) |
DDR5 8000 MHz | |
| DDR5 7800 MHz | ||
| DDR5 4800 MHz | ||
| DDR5 5200 MHz | ||
| DDR5 5600 MHz | ||
| DDR5 5800 MHz | ||
| DDR5 6000 MHz | ||
| DDR5 6200 MHz | ||
| DDR5 6400 MHz | ||
| DDR5 6600 MHz | ||
| DDR5 7600 MHz | ||
| DDR5 7200 MHz | ||
| DDR5 6800 MHz | ||
| DDR5 7000 MHz | ||
Memory type |
DDR5 | |
Memory technology |
Dual Channel | |
Maximum RAM capacity per slot |
64 GB | |
Maximum RAM capacity |
256 GB | |
Graphic |
Integrated graphics controller |
No |
Compatible graphics core integrated in the CPU |
Yes | |
Expansion slots |
Graphic connector(s) |
1 X PCI Express 5.0 x16 |
Number and Type of slots |
1 X PCI Express 4.0 x16 (x4) | |
Multi-GPU type |
None | |
Audio |
Audio Chipset |
Integrated |
Number of audio channels |
8 | |
Network |
Number of ports/Ethernet controler |
1 X Integrated Realtek 2.5 GbE |
Network standard(s) |
2.5 Gbps Gigabit Ethernet (2.5 GbE) | |
Wi-Fi |
No | |
Storage |
RAID supported |
Yes |
Hard drives connectors |
4 X Serial ATA 6Gb/s (SATA Revision 3) | |
| 1 X M.2 - PCI-E 5.0 x4 | ||
| 2 X M.2 - PCI-E 4.0 x4 | ||
Number of M.2 slot(s) |
3 | |
Supported RAID Modes |
5 | |
| 10 | ||
| 1 | ||
| 0 | ||
Connectivity |
Motherboard connector location |
Standard connectors (on the motherboard) |
Rear panel connectors |
2 X USB 3.0 | |
| 2 X DisplayPort Female | ||
| 4 X USB 2.0 | ||
| BIOS Flash Update | ||
| 1 X HDMI Female | ||
| 2 X USB 3.1 | ||
| 1 X RJ45 Female | ||
| 3 X 3.5mm Jack Female Stereo | ||
Additional connectors |
Front panel audio | |
| 1 X +12V (Power supply P8) | ||
| 1 X ATX 24 Pin | ||
| 4 X Internal USB 2.0 | ||
| 2 X Internal USB 3.0 | ||
| Chassis intrusion | ||
| 1 X +12V (Power supply P4) | ||
| 1 X Internal USB 3.0 Type C | ||
| Internal S/PDIF | ||
| 1 X Serial (RS-232) | ||
| 3 X Addressable LED RGB connector(s) | ||
Physical characteristics |
Motherboard format |
Micro ATX |
Length |
244 mm | |
Width |
244 mm | |
Equipment |
Advanced overclocking features |
Yes |
Use |
Gaming | |
| Office | ||
LED |
No | |
Warranties |
Commercial warranty |
Seller 2 years
|
Legal warranty |
See terms & conditions
|
|
Safety Information |
Responsible person |
ASUS Computer GmbH |
Postal address |
Harkort STR. 21-23, 40880 RATINGEN, GERMANY | |
Electronic Address |
ProducSafety@asus.com |
See all ASUS products
Product referenced on 20 May 2025
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