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ASUS Pro WS B850M-ACE SE AMD AM5 B850 mATX MicroATX Business motherboard, PCIe 5.0 x 16, DDR5, 2x PCIe 5.0 M.2, PCIe 5.0 MCIO, U.2, 10G & 2.5G LAN, USB4, ASUS Control Center Express Remote Management
- Ready for Advanced AI PCs: Built to power next-gen AI workloads with robust performance, ultrafast connectivity, and future-proof architecture.
- AMD AM5 Socket Support: Compatible with AMD Ryzen 9000/8000/7000 Series and AMD EPYC 4005 Series processors.
- Ultrafast Connectivity: Two PCIe 5.0/4.0 x16 slot (one at x4), 10 Gb & 2.5 Gb LAN ports, two PCIe 5.0 x4 M.2 slots, front USB 20Gbps Type-C and MCIO NVMe support.
- Server-grade IPMI Remote Management: Supports onboard BMC AST2600, along with ASUS Control Center Express IT management software for real-time monitoring and management.
- Proven Reliability & Stability: Extensively validated with broad compatibility, a comprehensive QVL, and tested for 24/7 operation.
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PRO WS B850M ACE SE
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 3 years
- Limited Warranty period (labor): 3 years
- Read full details
Return Policies
- Return for refund until: January 31, 2026
- Return for replacement until: January 31, 2026
- This item is covered by Newegg.com's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2025 and December 31, 2025 you will have until January 31, 2026 to return your product.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-510-739-3777
- Support Website
- View other products from ASUS
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The ASUS Pro WS B850M-ACE SE is a Micro-ATX AM5 workstation motherboard for Ryzen 9000, 8000 and 7000 or EPYC 4005 processors, suited to AI, content-creation and professional systems that need PCIe 5.0, dual high-speed networking and remote management.
Recommended For
- Homelab operators or small teams building a headless server who want to monitor and manage the system remotely through onboard BMC/IPMI rather than relying on physical access.
- Workstation builders who need a compact Micro-ATX system for a wired office or studio, with 10Gb and 2.5Gb networking for large local file transfers or networked storage.
- Small-server and virtualization builders who want an AM5 workstation board with remote management and room for a GPU plus a compatible storage or network controller; check card dimensions and slot clearance before buying.
- Developers or workstation users building a compact local AI or compute system who want an AM5 platform with PCIe 5.0 graphics connectivity, fast wired networking, and remote system management.
Real-World Use Scenarios
- A creator building a compact desk-side workstation can pair an AM5 processor and discrete graphics card with fast NVMe storage; the Micro-ATX format keeps the build smaller while supporting demanding content-creation workflows.
- Someone running local AI models can build a workstation around a Ryzen 9000-series CPU and suitable graphics card; ASUS says its AI Cache Boost setting can improve some local LLM workloads, but results depend on the CPU, memory tuning, and workload.
- An IT admin managing a workstation or small server remotely can use the onboard BMC and dedicated management Ethernet to monitor and manage the system without relying on its main operating-system network connection.
- A video editor or engineering team moving large project files to shared storage can connect over 10Gb Ethernet; the practical transfer benefit depends on the NAS or network switch also supporting a compatible high-speed connection.
- A home-lab builder setting up a modest virtualization host can use the board’s remote-management features and, with a compatible processor and memory configuration, ECC support; it is a better fit when remote administration matters more than fitting many onboard M.2 drives.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | AM5 workstation and business systems needing DDR5 memory, PCIe expansion, flexible NVMe and SATA storage, multi-speed Ethernet, and remote-management connectivity |
| Processor And Chipset | AMD AM5 socket for Ryzen 9000, 8000, and 7000 Series desktop processors and EPYC 4005 Series processors, with an AMD B850 chipset |
| Memory Configuration | Four DDR5 DIMM slots, dual-channel, up to 256GB; supports DDR5 5600 and DDR5 8000, AMD EXPO, and ECC unbuffered memory |
| Expansion And Storage | PCIe slot modes vary by processor: Ryzen 9000/7000 and EPYC 4005 support one PCIe 5.0 x16 slot at x16; Ryzen 8000 supports one PCIe 4.0 x16 slot at x8/x4; the B850 chipset provides one PCIe 4.0 x16 slot at x4. Two 2280 M.2 Key M slots support PCIe 5.0 x4 with Ryzen 9000/7000 and EPYC 4005, or PCIe 4.0 modes with Ryzen 8000. The PCIe 5.0 MCIO connector shares bandwidth with M.2_2, disabling that slot when MCIO is in use; Ryzen 8000 uses PCIe 4.0 x4/x2 modes for MCIO. Four SATA 6Gb/s ports are available. U.2 supports PCIe 3.0 x4 through a separately purchased SFF-8643 adapter; enabling U.2 disables the SATA ports |
| Networking And Remote Management | 10Gb Ethernet, 2.5Gb Ethernet, and a dedicated 1Gb management LAN for AST2600; the board includes an ASUS Control Center Express activation key card |
| Ports And Connectivity | Rear connections include three USB 10Gbps Type-A, two USB 10Gbps Type-C (one supports DisplayPort video output), two USB 2.0 Type-A, DisplayPort, VGA, HDMI, two audio jacks, and Clear CMOS. Headers provide two additional USB 5Gbps ports and four USB 2.0 ports; a USB 2.0 Type-A port supports BIOS FlashBack. Also includes a Thunderbolt (USB4) header |
| Audio | Realtek 7.1-channel HD audio with jack detection, multi-streaming, front-panel jack retasking, and playback up to 24-bit/192kHz; 32-bit/192kHz is not supported for 7.1-channel audio |
| Power And Cooling | 24-pin main power, 8-pin and 4-pin CPU power connectors, one CPU fan header, one CPU optional fan header, three chassis fan headers, and one W_PUMP+ header |
| BIOS And Board Features | 512Mb UEFI AMI BIOS with BIOS FlashBack, Clear CMOS, and ASUS board-design, protection, and diagnostic features |
| Form Factor And Physical Details | Micro ATX, 9.6 × 9.6 inches; black |
| Model Identifiers | ASUS Pro WS B850M-ACE SE |



















