Asus PRO WS B850M-ACE SE Workstation Motherboard - WS B850M ACE SE AMD B850 Chipset Socket AM5 Micro ATX EPYC, Ryzen 5, Ryzen 7, Ryzen 9 Processor Supported 256 GB DDR5 SDRAM Maximum RAM DIMM, UDIMM 4 x Memory Slots Gigabit Ethernet 2.5Gigabit E

• AI-powered:
  Yes
  

• Chipset Manufacturer:
  AMD
  
• Chipset Model:
  B850
  
• Total Processor Supported:
  1
  
• Processor Socket:
  Socket AM5
  
• Processor Supported:
  EPYC, Ryzen 5, Ryzen 7, Ryzen 9
  

• Number of Memory Slots:
  4
  
• Memory Form Factor:
  DIMM, UDIMM
  
• Maximum Memory Supported:
  256 GB
  
• Memory Speed Supported:
  8000 MHz, 5600 MHz
  
• Memory Technology:
  DDR5 SDRAM
  
• Error Checking:
  ECC
  

• Controller Type:
  Serial ATA/600
  
• RAID Supported:
  Yes
  
• RAID Levels:
  0, 1, 5, 10
  

• Onboard Video:
  CPU Dependent Video
  

• Audio Channels:
  7.1
  

• Gigabit Ethernet:
  Yes
  
• 2.5Gigabit Ethernet:
  Yes
  
• 10Gigabit Ethernet:
  Yes
  

• Total Number of Expansion Slots:
  3
  
• Total Number of PCI Express Slots:
  3
  
• Number of PCI Express x16 Slots:
  3
  
• PCI Express Standard:
  PCI Express 4.0, PCI Express 5.0
  

• Total Number of USB Ports:
  7
  
• VGA:
  Yes
  
• HDMI:
  Yes
  
• DisplayPort:
  Yes
  
• Number of Network (RJ-45) Ports:
  3
  
• Thunderbolt:
  Yes
  
• Number of Thunderbolt 4 Ports:
  2
  

• Number of SATA Interfaces:
  4
  
• Number of M.2 Interfaces:
  2
  
• Total Number of Onboard USB Ports:
  7
  
• Number of Onboard USB 2.0 Ports:
  4
  

• Form Factor:
  Micro ATX
  
• Height:
  0.2"
  
• Width:
  9.6"
  
• Depth:
  9.6"
  
• Weight (Approximate):
  3.04 lb
  

• Environmental Compliance:
  Restriction of Hazardous Substances (RoHS)
  

CPU
AMD Socket AM5 for AMD Ryzen^TM 9000 and 8000 and 7000 Series Desktop Processors and AMD EPYC^TM 4005 Series Processors^note
Note: Refer to https://www.asus.com/support/download-center/ for CPU support list.
Chipset
AMD B850 Chipset
Memory
4 x DIMM slots, max. 256GB, DDR5
Supports up to 8000+MT/s(OC) with Ryzen^TM 9000 and 8000 and 7000 Series Processors, ECC and Non-ECC Un-buffered DIMM^note
Supports up to 5600MT/s with AMD EPYC^TM 4005 Series Processors, ECC and Non-ECC Un-buffered DIMM^note
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO^TM)
Note: Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory
configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/download-center/. Adjustments will be made based
on the specifications of mass-produced memory products available on the market.
Note: Non-ECC, un-buffered DDR5 memory supports
On-Die ECC function.
Graphics
1 x DisplayPort^note2
1 x VGA port from AST2600
1 x HDMI^TM port^note3
1 x USB 10Gbps port (USB Type-C) supports
DisplayPort video output^note2
Note1: Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
Note2: Supports max. 8K at 30Hz as specified in DisplayPort 1.4.
Note3: Supports 4K at 60Hz as specified in HDMI 2.1.
Expansion Slots
AMD Ryzen^TM 9000 and 7000 Series Desktop Processors and AMD EPYC^TM 4005 Series Processors^note1
1 x PCIe 5.0 x16 slot (supports x16 mode)
AMD Ryzen^TM 8000 Series Desktop Processors
1 x PCIe 4.0 x16 slot (supports x8/x4 mode)^note2
AMD B850 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)
Note1: Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).
Note2: Specifications vary by CPU types.
- To ensure compatibility of the device installed, please refer to
https://www.asus.com/support/download-center/ for the list of supported peripherals.
Storage
Total supports 2 x M.2 slots, 1 x MCIO connector, 1 x U.2 connector and 4 x SATA 6Gb/s ports
AMD Ryzen^TM 9000 and 7000 Series Desktop Processors and AMD EPYC^TM 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)^note2
AMD Ryzen^TM 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)^note2
AMD B850 Chipset
U.2_1 connector supports PCIe 3.0 x4 mode via an SFF-8643 adapter cable. The cable is purchased separately.
4 x SATA 6Gb/s ports^note3
Note1: Specifications vary by CPU types.
Note2: MCIO connector shares bandwidth with M.2_2 slot. When MCIO connector is operating, M.2_2 slot will be disabled.
Note3: U.2 shares bandwidth with SATA ports, Enable U.2 in BIOS menu to support a NVMe storage device, and SATA ports will be disabled.
RAID Support
AMD RAIDXpert2 Technology^note
Ryzen^TM 9000 Series Processors: RAID 0/1/5/10
Ryzen^TM 8000 Series Processors: RAID 0/1
Ryzen^TM 7000 Series Processors: RAID 0/1/10
Note: Specifications vary by CPU types.
Ethernet
1 x Realtek 10Gb Ethernet
1 x Intel 2.5Gb Ethernet
1 x Realtek 1Gb Ethernet^note
ASUS LANGuard
Note: This dedicated LAN port is for BMC and IPMI connections only, internet access is not supported.
USB
Rear USB (Total 7 ports)
5 x USB 10Gbps port(s) (3 x Type-A + 2 x USB Type-C)
2 x USB 2.0 port(s) (2 x Type-A)
Front USB (Total 7 ports)
1 x USB 20Gbps (supports USB Type-C)
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
Note: USB Type-C power delivery output: max. 5V/3A Onboard USB port(s)
1 x USB 2.0 port (1 x Type-A) for BIOS FlashBack^TM
Audio
Realtek 7.1 Surround Sound High Definition Audio CODEC^note
- 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
Note1: Due to limitations in HDA bandwidth, 32-Bit/192 kHz is not supported for 7.1 Surround Sound audio.
Note2: The audio codec will be suspended once an AMD EPYC^TM 4005 Series Processor is installed.
Back Panel 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^TM 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
Internal I/O 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
Storage Related
2 x M.2 slots (Key M)
4 x SATA 6Gb/s ports
1 x U.2 connector
1 x MCIO connector
USB
1 x USB 20Gbps connector (support(s) USB Type-C )
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)
Miscellaneous
1 x BIOS FlashBack^TM 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^TM (USB4) header
Special 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^TM button
- BIOS FlashBack^TM LED
- Clear CMOS button
- Dual DIMM clips
- ProCool II
- SafeSlot
- SafeDIMM
Bespoke Motherboard Design and Business Focused Features
- 24/7 reliability
- Overcurrent protection
Software Features
ASUS Exclusive Software
Armoury Crate
- Fan Xpert 4
ASUS DriverHub
- ASUS CPU-Z
TurboV Core
Adobe Creative Cloud (Free Trial) ^note2
Norton 360 Deluxe (60 Days Free Trial)
WinRAR (40 Days Free Trial)
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUSTeK. EzFlash Utility