ASUS
ASUS Pro WS B850M-ACE SE AMD motherboard
A micro-ATX AMD B850 board for Ryzen 9000, 8000 and 7000 desktop CPUs plus EPYC 4005, with four DDR5 slots up to 256 GB, PCIe 5.0 x16 and dual PCIe 5.0 M.2, 10 Gb and 2.5 Gb LAN.
- CPU Socket TypeAM5
- CPU TypeAMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Deskt
- ChipsetAMD B850
- Number of Memory Slots4x288pin (DDR5)
- Memory StandardDDR5 5600 / DDR5 8000
- Maximum Memory Supported256GB
- AM5 socket supports Ryzen 9000, 8000, 7000 and EPYC 4005 processors
- DDR5 memory up to 256 GB with EXPO profiles and ECC support
- PCIe 5.0 x16 slot plus two PCIe 5.0 M.2 slots for high-speed storage
- Dual 10 Gbps and 2.5 Gbps LAN with USB 10 Gbps Type-C front header
- Onboard BMC AST2600 enables IPMI remote management via ASUS Control Center Express
Socket AM5 workstation board
The ASUS Pro WS B850M-ACE SE is a microATX motherboard built for AMD Ryzen 9000 8000 7000 Series and EPYC 4005 Series processors. It targets professionals who need server-grade remote management and high-speed storage in a compact form factor. Onboard BMC AST2600 and ASUS Control Center Express enable real-time monitoring for 24/7 operation. ECC un-buffered DDR5 support adds data integrity for critical workloads.
PCIe 5.0 and 4.0 lane allocation
The primary x16 slot runs at PCIe 5.0 x16 with Ryzen 9000 7000 and EPYC 4005 CPUs but drops to PCIe 4.0 x8 or x4 with Ryzen 8000 Series chips. A second chipset-driven x16 slot is limited to PCIe 4.0 x4. Two M.2 2280 slots connect directly to the CPU at PCIe 5.0 x4 each while an MCIO connector adds further NVMe expansion. Four SATA 6Gb/s ports provide legacy drive support.
256 GB DDR5 ceiling
Four 288-pin slots accept up to 256 GB of dual-channel DDR5 with AMD EXPO profiles spanning 5600 to 8000 MT/s. ECC capability is available across the full capacity range. This memory limit is the single figure that determines whether the board can handle large dataset processing or virtualisation clusters.
Points forts
- AM5 socket supports Ryzen 9000, 8000, 7000 and EPYC 4005 processors
- DDR5 memory up to 256 GB with EXPO profiles and ECC support
- PCIe 5.0 x16 slot plus two PCIe 5.0 M.2 slots for high-speed storage
- Dual 10 Gbps and 2.5 Gbps LAN with USB 10 Gbps Type-C front header
- Onboard BMC AST2600 enables IPMI remote management via ASUS Control Center Express
Caractéristiques
| Brand | ASUS |
|---|---|
| Model | Pro WS B850M-ACE SE |
| CPU Socket Type | AM5 |
| CPU Type | AMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors and AMD EPYC 4005 Series Processors |
| Chipset | AMD B850 |
| Number of Memory Slots | 4x288pin (DDR5) |
| Memory Standard | DDR5 5600 / DDR5 8000 |
| Maximum Memory Supported | 256GB |
| Channel Supported | Dual Channel |
| Memory Performance Profile | AMD EXPO |
| ECC Supported | Yes |
| Buffer Supported | Un-buffered |
| PCI Express 5.0 x16 | AMD Ryzen 9000 & 7000 Series Desktop Processors and AMD EPYC 4005 Series Processors 1 x PCIe 5.0 x16 slot (supports x16 mode) AMD Ryzen 8000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x8/x4 mode) |
| PCI Express 4.0 x16 | AMD B850 Chipset 1 x PCIe 4.0 x16 slot (supports x4 mode) |
| PCI Slots | 2 x PCI Slots |
| Serial ATA (SATA) | 4 x SATA 6Gb/s |
| M.2 | AMD Ryzen 9000 & 7000 Series Desktop Processors and AMD EPYC 4005 Series Processors M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode) MCIO connector (supports PCIe 5.0 x4 mode) AMD Ryzen 8000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode) MCIO connector (supports PCIe 4.0 x4/x2 mode) AMD B850 Chipset U.2_1 connector supports PCIe 3.0 x4 mode via an SFF-8643 adapter cable. The cable is purchased separately. Specifications v |
| Audio Chipset | Realtek 7.1 Surround Sound High Definition Audio CODEC - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - Premium audio capacitors - Dedicated audio PCB layers *Due to limitations in HDA bandwidth, 32-Bit/192 kHz is not supported for 7.1 Surround Sound audio. |
| Max LAN Speed | 10Gbps + 2.5Gbps + 1Gbp |
| Back I/O Ports | 3 x USB 10Gbps port(s) (3 x Type-A ) 1 x USB 10Gbps port(s) (USB Type-C) 1 x USB 10Gbps port(s) (USB Type-C) supports DisplayPort video output 2 x USB 2.0 port(s) (2 x Type-A) 1 x DisplayPort 1 x VGA port 1 x HDMI port 1 x Realtek 10Gb Ethernet port 1 x Intel 2.5Gb Ethernet ports 1 x Realtek 1Gb Ethernet (Dedicated management LAN for AST2600) 2 x Audio jacks 1 x Clear CMOS button |
| Onboard USB | 1 x USB 5Gbps header(s) support(s) 2 additional USB 5Gbps ports 2 x USB 2.0 header(s) support(s) 4 additional USB 2.0 ports 1 x USB 2.0 port (1 x Type-A) for BIOS FlashBack |
| Other Connectors | Fan and Cooling Related 1 x 4-pin CPU Fan header(s) 1 x 4-pin CPU OPT Fan header(s) 3 x 4-pin Chassis Fan header(s) 1 x W_PUMP+ header(s) Power Related 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connector 1 x 4-pin +12V CPU Power connector Miscellaneous 1 x BIOS FlashBack button 1 x Chassis Intrusion header 1 x COM Port header 1 x Reset button 1 x Front Panel Audio header (F_AUDIO) 1 x SPI TPM header (14-1 pin) 1 x Start button 1 x 10-1 pin Front Panel System header 1 x RTC Battery header 1 x Thermal Sensor header 1 x Thunderbolt (USB4) header |
| Form Factor | Micro ATX |
| Dimensions (W x L) | 9.6" x 9.6" |
| Power Pin | 24 Pin |
| BIOS Feature | 512 Mb Flash ROM, UEFI AMI BIOS (text-based) |
| Software | ASUS Exclusive Software Armoury Crate - Fan Xpert 4 ASUS DriverHub - ASUS CPU-Z TurboV Core Adobe Creative Cloud (Free Trial) Norton 360 Deluxe (60 Days Free Trial) WinRAR (40 Days Free Trial) UEFI BIOS ASUS EZ DIY - ASUS CrashFree BIOS 3 - ASUSTeK. EzFlash Utility |
| Features | ASUS 5X PROTECTION III - DIGI+ VRM (- Digital power design with DrMOS) - ESD Guards - LANGuard - Overvoltage protection - SafeSlot - Stainless-steel back I/O ASUS Q-Design - M.2 Q-Latch - Q-Code - Q-Connector - Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green]) - Q-Slot ASUS Thermal Solution - M.2 heatsink - Aluminum heatsink design ASUS EZ DIY - BIOS FlashBack button - BIOS FlashBack LED - Clear CMOS button - Dual DIMM clips - ProCool II - SafeSlot - SafeDIMM Bespoke Motherboard Design & Business Focused Features - 24/7 reliability - Overcurrent protection |
| Package Contents | Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x I/O shield 1 x Q-connector 1 x M.2 rubber package(s) Documentation 1 x ACC Express activation key card 1 x Quick start guide |
| Poids d’expédition | 1.36 kg |
| Dimensions du colis | 279 × 279 × 76 mm |
Questions sur cet article
Will this board fit in a standard mATX case and still leave room for a dual-slot graphics card?
The board uses the mATX form factor with a single PCIe 5.0 x16 slot running at x16 with Ryzen 9000, 7000 or EPYC 4005 series CPUs. A dual-slot card installs directly into that slot; the two legacy PCI slots sit below it and do not interfere.
Can I run four DDR5 modules at the rated 8000 speed with ECC enabled?
The board supports up to 256 GB across four 288-pin slots in dual-channel mode. AMD EXPO profiles up to 8000 are validated and ECC is supported with un-buffered modules; actual stability depends on the CPU memory controller and module quality.
Which M.2 slots provide PCIe 5.0 x4 throughput for the OS drive?
Both M.2_1 and M.2_2 are Key M 2280 slots wired for PCIe 5.0 x4 when a Ryzen 9000, 7000 or EPYC 4005 series processor is installed. Either slot can host the boot drive at full speed.
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