ASUS PRIME B850M-A-CSM
Motherboard | micro ATX | Socket AM5 | AMD B850 Chipset | USB 3.2 Gen 2, USB 3.2 Gen 1, USB-C 3.2 Gen 1 | 2.5 Gigabit LAN | onboard graphics (CPU required) | HD Audio (8-channel)
Main Specification
| Product Description | ASUS PRIME B850M-A-CSM - motherboard - micro ATX - Socket AM5 - AMD B850 |
|---|---|
| Product Type | Motherboard - micro ATX |
| Chipset Type | AMD B850 |
| Processor Socket | 1 x Socket AM5 |
| Compatible Processors | (supports Ryzen 7000/8000/9000 Series) |
| Max RAM Size | 256 GB |
| RAM Supported | 4 DIMM slots - DDR5, non-ECC, ECC, on-die ECC, unbuffered |
| Storage Ports | 4 x SATA-600 (RAID), 3 x M.2 |
| USB / FireWire Ports | 2 x USB 3.2 Gen 2 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 + (1 x USB-C 3.2 Gen 1 + 2 x USB 3.2 Gen 1 + 4 USB 2.0 via headers) |
| Audio | HD Audio (8-channel) |
| LAN | 2.5 Gigabit Ethernet |
General
| Product Type | Motherboard - micro ATX |
|---|---|
| Chipset Type | AMD B850 |
| Processor Socket | Socket AM5 |
| Max Processors Qty | 1 |
| Compatible Processors | (supports Ryzen 7000/8000/9000 Series) |
Supported RAM
| Max Size | 256 GB |
|---|---|
| Technology | DDR5 |
| Bus Clock | 8000 MT/s (O.C.) |
| Supported RAM Integrity Check | Non-ECC, ECC, on-die ECC |
| Registered or Buffered | Unbuffered |
| Features | Dual channel memory architecture, AMD EXPO technology |
Audio
| Type | HD Audio (8-channel) |
|---|---|
| Compliant Standards | High Definition Audio |
LAN
| Network Interfaces | 2.5 Gigabit Ethernet |
|---|
Expansion / Connectivity
| Expansion Slots | 1 x CPU 4 x DIMM 288-pin 1 x PCIe 5.0 x16 1 x PCIe 4.0 x16 2 x M.2 socket (2280 M.2 Key M slot) M.2 socket (2242/2260/2280 M.2 Key M slot) |
|---|---|
| Storage Interfaces | SATA-600 -connectors: 4 x 7pin Serial ATA - RAID 0 / RAID 1 / RAID 10 / RAID 5 PCIe 5.0 -connectors: 1 x M.2 - RAID 0 / RAID 1 / RAID 10 / RAID 5 PCIe 4.0 -connectors: 2 x M.2 - RAID 0 / RAID 1 / RAID 10 / RAID 5 |
| RAID Features | AMD RAID Xpert2 Technology |
| Interfaces | 1 x LAN (2.5Gigabit Ethernet) 1 x HDMI 2 x DisplayPort 2 x USB 3.2 Gen 2 2 x USB 3.2 Gen 1 4 x USB 2.0 1 x audio line-out - mini-jack 1 x audio line-in - mini-jack 1 x microphone - mini-jack |
| Internal Interfaces | 1 x USB-C 3.2 Gen 1 - header 2 x USB 3.2 Gen 1 - header 4 x USB 2.0 - header 1 x SPDIF out - header 1 x SPI - header 1 x audio - header 1 x serial - header |
| Power Connectors | 24-pin main power connector, 8-pin ATX12V connector, 4-pin ATX12V connector |
Features
| BIOS Type | AMI |
|---|---|
| BIOS Features | UEFI BIOS, ASUS EZ Flash 3, ASUS UEFI BIOS EZ Mode |
| Sleep / Wake Up | Wake on LAN (WOL), wake on PME |
| Hardware Features | ASUS Enhanced Memory Profile (AEMP), CrashFree BIOS 3, Preboot eXecution Environment (PXE), LANGuard, ASUS 5X Protection III, BIOS FlashBack button, ASUS DIGI+ VRM, ASUS Overvoltage Protection, ASUS SafeSlot, ASUS Q-Design, ASUS Stainless Steel Back I/O, ASUS Aura Sync, ASUS EZ DIY, BIOS FlashBack LED, M.2 heatsink, Q-Dashboard, Q-DIMM, Q-LED Core, Q-Slot, VRM heatsink design, 6 Layer PCB, 8+2+1 Phase Power Design, AI Cache Boost, chipset heatsink |
Miscellaneous
| Included Accessories | 1 x M.2 rubber package, 2 x M.2 screw package, ACC Express Activation Key Card |
|---|---|
| Cables Included | 2 x Serial ATA cable |
| Software Included | Armoury Crate, ASUS AURA Creator, ASUS Fan Xpert 2+, ASUS AI Advisor, TurboV Core, ASUS CPU-Z, Norton 360 Deluxe (60 days trial), WinRAR (40 days trial) |
| Compliant Standards | DisplayPort 1.4 |
| Width | 24.4 cm |
| Depth | 24.4 cm |
Product features
Versatile expansion options
This motherboard includes multiple expansion slots, featuring two PCIe 5.0 x16 slots and a total of four DIMM slots that cater to various hardware configurations, providing flexibility for upgrades.Comprehensive connectivity
Equipped with multiple USB ports including USB 3.2 Gen 2, USB-C, and traditional USB 2.0 options, this motherboard ensures that users can connect a wide array of peripherals effortlessly. Additionally, audio line-in and line-out interfaces deliver high-definition audio outputs.Enhanced reliability features
The ASUS PRIME B850M-A-CSM incorporates several reliability features such as ASUS 5X Protection III, CrashFree BIOS 3, and the unique BIOS FlashBack button, ensuring a secure and seamless user experience.Advanced cooling design
Designed with a VRM heatsink and M.2 heatsink, this motherboard offers efficient heat dissipation to maintain optimal performance during demanding tasks, enhancing system stability under load.User-friendly BIOS
Featuring an AMI BIOS with ASUS UEFI BIOS EZ Mode and ASUS EZ Flash 3, this motherboard makes system configuration and updates straightforward, perfect for beginners and experienced users.Key selling points
- Supports Ryzen 7000/8000/9000 Series processors
- Compatible with DDR5 memory technology for faster performance
- Equipped with ample M.2 and SATA storage options
- Includes advanced BIOS features for easy updates
- Robust networking capabilities with 2.5 Gigabit Ethernet
References
MPN: 90MB1LQ0-M0EAYC
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28/08/2026 21:58:19