The ASUS PRIME B850-PLUS-CSM is a high-performance ATX motherboard built on the AMD B850 chipset and designed for the AM5 socket. It is compatible with AMD Ryzen 7000, 8000, and 9000 series processors, making it a versatile choice for both current and next-generation AMD builds. The board features a clean silver and black design and supports up to 256GB of DDR5 memory across four DIMM slots in a dual-channel configuration, with overclocked speeds reaching 8000+ MHz.
Storage and Expansion
The ASUS PRIME B850-PLUS-CSM offers extensive storage and expansion options. It includes three M.2 slots, with the first supporting up to the 22110 form factor and PCIe 5.0 speeds, alongside four SATA III connectors for traditional drives. For expansion cards, the board provides one PCIe 5.0 x16 slot and one PCIe 4.0 x16 slot, giving users flexibility for graphics cards and other high-bandwidth components.
Connectivity and Audio
This motherboard delivers a broad range of connectivity options. On the rear panel, users will find HDMI and DisplayPort outputs, a Realtek 2.5GbE LAN port, multiple USB 3.2 Gen 1 and Gen 2 ports in both Type-A and Type-C configurations, and four USB 2.0 ports. A Thunderbolt header is also present for additional expansion possibilities. Audio is handled by a Realtek 7.1 Surround Sound HD Audio CODEC with S/PDIF output, providing a rich and immersive sound experience for both gaming and multimedia use.
Product number manufacturer:
90MB1LC0-M0EAYC
Audio
Realtek 7.1 Surround Sound HD Audio CODEC
BIOS
Connectivity
USB 3.2 (Gen 1) type A ports:
3
USB 3.2 (Gen 1) type C ports:
1
USB 3.2 (Gen 2) type A ports:
3
USB 3.2 (Gen 2) type C ports:
1
Internal I/O
1st M.2 maximum slot size:
22110
1st M.2 slot PCI Express generation:
5.0
ATX Power connector (24-pin):
Chassis fan connector(s):
4
Chassis intrusion connector:
EPS power connector (8-pin):
Front panel audio connector:
Thunderbolt header (5-pin):
1
USB 3.1 (3.1 Gen 2) connectors:
0
USB 3.1 (Gen 1) header(s):
2
Memory
Supported memory clock speeds (OC):
8000+ (OC) MHz
Networking
Network technology (wired):
Physical characteristics
Processor
Compatible processor series:
AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Sockets
Technical details
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