The ASUS PRIME B650M-A II-CSM is a Micro-ATX motherboard built on the AMD B650 chipset, designed for use with AMD Ryzen 7000, 8000, and 9000 Series processors via Socket AM5. With its compact 244 x 244 mm form factor and sleek black finish, it fits comfortably in a wide range of builds. The board supports up to 128GB of DDR5 memory across four DIMM slots in dual-channel configuration, with speeds ranging from 4800 MHz up to 6400 MHz (OC), providing a solid foundation for modern computing workloads.
Connectivity and Expansion
The ASUS PRIME B650M-A II-CSM offers a comprehensive set of connectivity options. Storage is handled through 4 SATA III ports and 2 M.2 slots, while expansion is supported by 3 PCI Express 3.0 x16 slots. For display output, the board includes one HDMI and one DisplayPort. USB connectivity is extensive, featuring 6 USB 2.0 ports, 3 USB 3.2 Gen 1 Type-A ports, 1 USB 3.2 Gen 1 Type-C port, and 2 USB 3.2 Gen 2 Type-A ports, alongside multiple internal headers for front-panel USB connections.
Audio and Networking
Audio performance is driven by the Realtek 7.1 Surround Sound HD Audio CODEC, delivering rich multi-channel sound with a dedicated headphone output. Network connectivity is provided by a Realtek 2.5GbE LAN chip, supporting 2500 Mbps wired networking for fast and reliable data transfer. A UEFI AMI BIOS with 256 Mbit memory and a Clear CMOS button round out the feature set, making configuration and system management straightforward.
Product number manufacturer:
90MB1EH0-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:
2
Expansion slots
PCI Express 3.0 x16 slots:
3
Internal I/O
ATX Power connector (24-pin):
Chassis fan connector(s):
3
Front panel audio connector:
USB 3.1 (3.1 Gen 2) connectors:
0
USB 3.1 (Gen 1) header(s):
2
Memory
Supported memory clock speeds:
4800, 5000, 5200, 5400, 5600, 5800, 6000, 6200, 6400 MHz
Supported memory clock speeds (OC):
6400 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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