ASUS PRIME B850-PLUS-CSM
Motherboard | ATX | Socket AM5 | AMD B850 Chipset | USB-C 3.2 Gen2, 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 B850-PLUS-CSM - motherboard - ATX - Socket AM5 - AMD B850 |
|---|---|
| Product Type | Motherboard - ATX |
| Chipset Type | AMD B850 |
| Processor Socket | 1 x Socket AM5 |
| Compatible Processors | Ryzen (supports Ryzen 7000/8000/9000 Series) |
| Max RAM Size | 256 GB |
| RAM Supported | 4 DIMM slots - DDR5, non-ECC, on-die ECC, unbuffered |
| Storage Ports | 4 x SATA-600 (RAID), 3 x M.2 |
| USB / FireWire Ports | 1 x USB-C 3.2 Gen 2 + 3 x USB 3.2 Gen 2 + 2 x USB 3.2 Gen 1 + 2 x USB 2.0 + (1 x USB4 + 1 x USB-C 3.2 Gen 1 + 2 x USB 3.2 Gen 1 + 6 x USB 2.0 via headers) |
| Audio | HD Audio (8-channel) |
| LAN | 2.5 Gigabit Ethernet |
General
| Product Type | Motherboard - ATX |
|---|---|
| Chipset Type | AMD B850 |
| Processor Socket | Socket AM5 |
| Max Processors Qty | 1 |
| Compatible Processors | Ryzen (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, on-die ECC |
| Registered or Buffered | Unbuffered |
| Features | AMD EXPO technology, dual channel memory architecture |
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 (x4 mode) 2 x M.2 socket (2280 M.2 Key M slot) 1 x M.2 socket (2242/2260/2280/22110 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 USB-C 3.2 Gen 2 3 x USB 3.2 Gen 2 2 x USB 3.2 Gen 1 2 x USB 2.0 1 x DisplayPort 1 x HDMI 2 x aerial 1 x LAN (2.5Gigabit Ethernet) 1 x microphone - mini-jack 1 x audio line-out - mini-jack 1 x audio line-in - mini-jack |
| Internal Interfaces | 6 x USB 2.0 - header 2 x USB 3.2 Gen 1 - header 1 x USB-C 3.2 Gen 1 - header 1 x audio - header 1 x serial - header 1 x Thunderbolt 4 - header 1 x SPDIF out - header 1 x SPI - header |
| Power Connectors | 24-pin main power connector, 4-pin ATX12V connector, 8-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 | Preboot eXecution Environment (PXE), CrashFree BIOS 3, ASUS 5X Protection III, ASUS Aura Sync, ASUS DIGI+ VRM, ASUS EZ DIY, ASUS Overvoltage Protection, ASUS Q-Design, ASUS SafeSlot, ASUS Stainless Steel Back I/O, BIOS FlashBack button, BIOS FlashBack LED, LANGuard, M.2 heatsink, pre-mounted I/O shield, Q-Antenna, Q-Dashboard, Q-DIMM, Q-LED Core, Q-Slot, VRM heatsink design, 8+2+1 Phase Power Design, ASUS Enhanced Memory Profile (AEMP), chipset heatsink, 6 Layer PCB |
Miscellaneous
| Included Accessories | 1 x M.2 rubber package, 3 x M.2 SSD screw package |
|---|---|
| Cables Included | 2 x Serial ATA cable |
| Software Included | Armoury Crate, Adobe Creative Cloud (free trial), ASUS AI Advisor, ASUS AURA Creator, ASUS CPU-Z, ASUS DriverHub, ASUS Fan Xpert 2+, ASUS GlideX, Norton 360 Deluxe (60 days trial), TurboV Core, WinRAR (40 days trial) |
| Width | 30.5 cm |
| Depth | 24.4 cm |
Product features
Robust connectivity options
The motherboard features multiple expansion slots, including PCIe 5.0 x16 and a variety of USB ports, providing options for connecting additional hardware and peripherals.Efficient thermal management
With specialized elements like an M.2 heatsink and VRM heatsink design, the motherboard helps maintain optimal temperatures even during demanding tasks, promoting system longevity.Advanced audio capabilities
The onboard audio system supports high definition audio output with 8-channel capability, ensuring immersive sound quality for gaming and media consumption.User-friendly BIOS features
The AMI BIOS includes helpful utilities such as ASUS EZ Flash 3 and CrashFree BIOS 3, simplifying system management and recovery.Networking flexibility
Equipped with 2.5 Gigabit Ethernet and Bluetooth, this motherboard supports high-speed wired connections along with versatile wireless options for seamless online experiences.Key selling points
- Supports AMD Ryzen 7000/8000/9000 Series processors
- 4 DIMM slots with DDR5 support for high-speed memory
- Multiple USB connectivity options including USB-C
- Integrated 2.5 Gigabit Ethernet for fast networking
- Cooling features for sustained performance
References
MPN: 90MB1LC0-M0EAYC
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28/08/2026 21:58:12