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ASUS PRIME B850-PLUS-CSM - motherboard - ATX - Socket AM5 - AMD B850
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)
Weight: 1.56 KG
- 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
Similar Products
Overview
The ASUS PRIME B850-PLUS-CSM is a versatile motherboard designed for high-performance computing. This ATX form factor board supports the AMD B850 chipset and is compatible with Ryzen 7000/8000/9000 Series processors, allowing for advanced processing capabilities. It features 4 DIMM slots supporting DDR5 SDRAM at speeds of up to 4000 MHz (O.C.), ensuring ample room for memory expansion and efficient operation. Equipped with multiple USB interfaces, including USB 3.2 Gen 2 and USB-C options, the motherboard ensures swift data transfer and connectivity for various peripherals. The integrated 2.5 Gigabit Ethernet provides enhanced networking capabilities, making it suitable for casual users and gamers. With its cooling features, including an M.2 heatsink and VRM heatsink design, the ASUS PRIME B850-PLUS-CSM enables optimal thermal performance during intense tasks, offering a reliable foundation for any build.
Main Specifications
- 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
Associated Documents
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.
What's in the box
ASUS PRIME B850-PLUS-CSM 2 x Serial ATA cable, 1 x M.2 rubber package, 3 x M.2 SSD screw package, Software
Specifications
General
- Max Processors Qty
- 1
- Product Type
- Motherboard - ATX
- Processor Socket
- Socket AM5
- Compatible Processors
- Ryzen (supports Ryzen 7000/8000/9000 Series)
- Chipset Type
- AMD B850
Connections & Expansion
- 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 5ID 0 / RAID 1 / RAID 10 / RAID 5
- 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
- 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)
- 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
- Power Connectors
- 24-pin main power connector, 4-pin ATX12V connector, 8-pin ATX12V connector
- RAID Features
- AMD RAID Xpert2 Technology
Miscellaneous
- Width
- 30.5 cm
- Depth
- 24.4 cm
- Cables Included
- 2 x Serial ATA cable
- Included Accessories
- 1 x M.2 rubber package, 3 x M.2 SSD screw package
- 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)
Audio
- Compliant Standards
- High Definition Audio
- Type
- HD Audio (8-channel)
Features
- BIOS Type
- AMI
- Sleep / Wake Up
- Wake on LAN (WOL), wake on PME
- BIOS Features
- UEFI BIOS, ASUS EZ Flash 3, ASUS UEFI BIOS EZ Mode
- 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
LAN
- Network Interfaces
- 2.5 Gigabit Ethernet
Supported RAM
- Registered or Buffered
- Unbuffered
- Max Size
- 256 GB
- Technology
- DDR5
- Features
- AMD EXPO technology, dual channel memory architecture
- Supported RAM Integrity Check
- Non-ECC, on-die ECC
- Bus Clock
- 8000 MT/s (O.C.)





