The ASRock B850 Pro RS is an ATX motherboard built on the AMD B850 chipset, designed for use with AMD Ryzen 7000, 8000, and 9000 Series processors via the Socket AM5 platform. With its silver and black finish and standard ATX form factor measuring 305 x 244 mm, this board is a solid foundation for a wide range of desktop builds. It supports DDR5 memory in a dual-channel configuration across four DIMM slots, with a maximum capacity of 256 GB and overclocked memory speeds exceeding 8000 MHz.
Connectivity and Expansion
The ASRock B850 Pro RS offers extensive connectivity options for both storage and peripherals. Four M.2 slots and four SATA III connectors provide ample storage flexibility, while one PCIe x16 Gen 5 and one PCIe x16 Gen 4 slot cover graphics and additional expansion needs. USB connectivity is comprehensive, featuring ten USB 2.0 ports, eight USB 3.2 Gen 1 Type-A ports, one USB 3.2 Gen 1 Type-C port, and one USB 3.2 Gen 2 Type-C port, along with internal headers for further front panel connections.
Networking and Audio
For wired networking, the board includes a single 2.5G LAN port powered by the Dragon RTL8125BG controller, delivering fast and stable network performance. Audio is handled by the Realtek ALC897 chip, supporting 7.1 channel output for an immersive sound experience. Note that neither Wi-Fi nor Bluetooth are included on this board, so wireless connectivity requires a separate adapter.
Product number manufacturer:
90-MXBQK0-A0UAYZ
Audio
BIOS
Connectivity
USB 3.2 (Gen 1) type A ports:
8
USB 3.2 (Gen 1) type C ports:
1
USB 3.2 (Gen 2) type C ports:
1
Internal I/O
ATX Power connector (24-pin):
Chassis fan connector(s):
4
EPS power connector (8-pin):
Front panel audio connector:
USB 3.1 (Gen 1) header(s):
2
Memory
Supported memory clock speeds (OC):
8000+ (OC) MHz
Networking
Network technology (wired):
Packaging content
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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