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ASUS PRIME B860-PLUS-CSM LGA1851 ATX Motherboard
Business-ready Intel B860 ATX motherboard with DDR5, PCIe 5.0 graphics support, PCIe 5.0 M.2 storage, 2.5Gb Ethernet and ASUS CSM features.
Intel LGA1851Intel B860DDR5CSM
The ASUS PRIME B860-PLUS-CSM is an ATX motherboard for Intel Core Ultra Processors Series 2 on the LGA1851 platform, designed for business desktops, stable office systems and modern performance PCs. It combines Intel B860 chipset features, DDR5 memory support, PCIe 5.0 x16 graphics expansion, three M.2 storage slots, Realtek 2.5Gb Ethernet, USB-C connectivity and ASUS Corporate Stable Model support for easier long-term deployment.
Compatibility Note: Please confirm CPU support, BIOS version, DDR5 memory compatibility, ATX case size, PSU connectors, cooler clearance and expansion-card requirements before purchase. CPU, RAM, storage, graphics card, WiFi module and operating system are not included unless stated separately.
Best For
✓ Intel Core Ultra desktop builds
✓ Business and office PCs
✓ DDR5 ATX upgrades
✓ Stable CSM deployments
Key Features
Intel LGA1851 Platform
Built for Intel Core Ultra Processors Series 2, the PRIME B860-PLUS-CSM gives business and performance desktops a current Intel B860 foundation.
DDR5 and PCIe 5.0 Ready
Four DDR5 DIMM slots, PCIe 5.0 x16 graphics support and a PCIe 5.0 M.2 slot provide a modern base for fast memory, graphics and storage.
Flexible Storage Layout
Three M.2 slots and four SATA 6Gb/s ports support fast NVMe SSDs, bulk storage drives and practical business or workstation storage configurations.
CSM Business Stability
ASUS Corporate Stable Model positioning and ASUS management features make this board suitable for businesses that value consistent deployment and lifecycle planning.
Technical Specifications
| Brand |
ASUS |
| Model |
PRIME B860-PLUS-CSM |
| Manufacturer SKU |
90MB1KA0-M0EAYC |
| EAN |
4711387814857 |
| Product Type |
ATX motherboard |
| CPU Socket |
Intel LGA1851 |
| CPU Support |
Intel Core Ultra Processors Series 2, subject to BIOS and CPU support list |
| Chipset |
Intel B860 |
| Form Factor |
ATX, 30.5 × 24.4 cm |
| Memory Slots |
4 × DDR5 DIMM |
| Maximum Memory |
Up to 256GB |
| Memory Features |
DDR5 up to 8666+MT/s OC, dual-channel architecture, Intel XMP, DIMM Fit and ASUS Enhanced Memory Profile III |
| Expansion Slots |
1 × PCIe 5.0 x16 slot, 1 × PCIe 4.0 x16 slot supporting x4 mode, 1 × PCIe 4.0 x1 slot |
| M.2 Storage |
3 × M.2 Key M slots, including one PCIe 5.0 x4 CPU-connected slot |
| SATA Storage |
4 × SATA 6Gb/s ports |
| RAID Support |
Intel Rapid Storage Technology supports SATA RAID 0/1/5/10 |
| Ethernet |
1 × Realtek 2.5Gb Ethernet with ASUS LANGuard |
| Wireless |
Not integrated; M.2 Key E slot only, WiFi module sold separately |
| Display Outputs |
DisplayPort, HDMI and USB 20Gbps Type-C with DisplayPort Alt Mode; graphics output depends on CPU support |
| Rear USB |
1 × USB 20Gbps Type-C, 2 × USB 10Gbps Type-A, 1 × USB 5Gbps Type-A, 2 × USB 2.0 Type-A |
| Front USB Headers |
USB Type-C header, USB 5Gbps headers and USB 2.0 headers for front-panel expansion |
| Audio |
Realtek 7.1 Surround Sound High Definition Audio CODEC |
| RGB Headers |
Addressable Gen 2 headers and Aura RGB header |
| Business Features |
ASUS Corporate Stable Model support, ASUS Control Center Express support and manageability features |
| Special Features |
ASUS 5X Protection III, DIGI+ VRM, Q-Dashboard, Q-DIMM, Q-LED, Q-Slot, M.2 heatsink, ProCool and UEFI BIOS tools |
| Operating System Support |
Windows 11 22H2 or later and Windows 10 64-bit 21H2 or later, subject to CPU requirements |
Frequently Asked Questions
Which CPUs does this motherboard support?
It uses Intel LGA1851 and supports Intel Core Ultra Processors Series 2. Always check the ASUS CPU support list and BIOS version before installation.
Does it include WiFi?
No. This model does not include integrated WiFi. It provides an M.2 Key E slot for a compatible WiFi module, which is sold separately.
Is this a good choice for business desktops?
Yes. The CSM version is aimed at business use, with stable model positioning, ASUS management support and practical connectivity for long-term office deployments.
Singular Expert Insight
Choose the PRIME B860-PLUS-CSM if you need a stable Intel LGA1851 ATX motherboard for business or office PCs with DDR5, PCIe 5.0 graphics support, fast NVMe storage and 2.5Gb Ethernet. If built-in WiFi is required, consider a PRIME B860 WiFi model instead.
Buyer’s Guide
Buy it if
You want an Intel B860 ATX motherboard for LGA1851 systems with DDR5, PCIe 5.0 x16, three M.2 slots, 2.5Gb Ethernet and CSM business stability.
Skip it if
You need built-in WiFi, DDR4 memory support, an AMD platform, CPU overclocking features or a smaller micro-ATX motherboard.
Also consider
Consider a PRIME B860 WiFi variant if wireless networking is required, or a Z890 motherboard if you need the higher-end Intel chipset and more enthusiast features.