Technical Snapshot

The ASUS PRIME B850-PLUS-CSM is a ATX motherboard based on the B850 chipset for AMD AM5 processors. It supports DDR5 memory with up to 256 GB across 4 DIMM slots, 2.5G LAN, and 3 M.2 slots.

Use Case
Desktop PC builds, gaming, workstation
Compatibility
AMD AM5 processors
Category
ATX Motherboard — B850 Chipset
ASUS PRIME B850-PLUS-CSM
ASUS PRODUCT
ASUS

PRIME B850-PLUS-CSM

B850 · AMD AM5 · ATX · DDR5 up to 256 GB

CPU socket: AMD AM5. Compatible with AMD Ryzen desktop processors.
SocketAMD AM5
Maximum supported memory: 256 GB DDR5 across 4 DIMM slots.
Max RAM256 GB
B850 chipset with PCIe and M.2 expansion slots.
ChipsetB850
ATX form factor — standard tower compatible.
Form FactorATX
MPNPRIME B850-PLUS-CSM
CategoryMotherboards
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Connectivity & Expansion

PCIe x161
M.2 Slots3
SATA Ports4
LAN2.5G

Full Specifications

ChipsetB850
SocketAMD AM5
Form FactorATX
Memory TypeDDR5
DIMM Slots4
Max RAM256 GB
PCIe x16 Slots1
M.2 Slots3
SATA Ports4
LAN2.5G
RGBYes
SeriesCSM

Support & Downloads

Latest Firmware & DriversVisit ASUS for the latest updates
ASUS Downloads →
ASUS PRIME B850-PLUS-CSM DocumentationPDF · Installation guide and specifications
ASUS Support →
← Back to ASUS Motherboard Catalog

Frequently Asked Questions

What socket does the ASUS PRIME B850-PLUS-CSM use?

The ASUS PRIME B850-PLUS-CSM uses the AMD AM5 socket, compatible with AMD Ryzen desktop processors.

How much RAM does the ASUS PRIME B850-PLUS-CSM support?

The ASUS PRIME B850-PLUS-CSM supports up to 256 GB of DDR5 memory across 4 DIMM slots.

Does the ASUS PRIME B850-PLUS-CSM have Wi-Fi?

No, the ASUS PRIME B850-PLUS-CSM does not include built-in Wi-Fi.

How many M.2 slots does the ASUS PRIME B850-PLUS-CSM have?

The ASUS PRIME B850-PLUS-CSM has 3 M.2 slots for NVMe SSD storage.

What chipset does the ASUS PRIME B850-PLUS-CSM use?

The ASUS PRIME B850-PLUS-CSM is built on the B850 chipset, offering ATX form factor design for AMD platforms.

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