ASUS PRO WS B850M-ACE SE EPYC™ 4005 Series, DDR5,PCIe 5.0 x 16, PCIe 5.0 M.2

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Note: The specifications are subject to change without notice.
CPU AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors and AMD EPYC™ 4005 Series Processors*
* 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™ 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC Un-buffered DIMM*
Supports up to 5600MT/s with AMD EPYC™ 4005 Series Processors, ECC and Non-ECC Un-buffered DIMM*"
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO™)
* 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.
* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
Graphics 1 x DisplayPort**
1 x VGA port from AST2600
1 x HDMI™ port***
1 x USB 10Gbps port (USB Type-C®) supports DisplayPort video output**
* Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
** Supports max. 8K@30Hz as specified in DisplayPort 1.4.
*** Supports 4K@60Hz as specified in HDMI 2.1.
Expansion Slots 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)**
AMD B850 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)
* Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).
** 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™ 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.
4 x SATA 6Gb/s ports***
* Specifications vary by CPU types.
** MCIO connector shares bandwidth with M.2_2 slot. When MCIO connector is operating, M.2_2 slot will be disabled.
*** 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*
Ryzen™ 9000 Series Processors: RAID 0/1/5/10
Ryzen™ 8000 Series Processors: RAID 0/1
Ryzen™ 7000 Series Processors: RAID 0/1/10
* Specifications vary by CPU types.
Ethernet 1 x Realtek 10Gb Ethernet
1 x Intel® 2.5Gb Ethernet
1 x Realtek 1Gb Ethernet*
ASUS LANGuard
* 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
* 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™
Audio "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.
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™ 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™ 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
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™ 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
Software Features 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
* For more software features, please visit the asus support site or refer to www.asus.com/support for additional information.
** For detailed information on the supported models and restricted regions for this redemption offer, please refer to https://www.asus.com/content/asus-offers-adobe-creative-cloud/.
Remote Management Features IT Management software supported
- ASUS Control Center Express(ACCE)
BMC Related
1 x BMC switch
1 x BMC LAN fixed IP switch
1 x Message LED header
1 x microSD card socket
1 x Location LED header
1 x Location button header
1 x PSU_SMB header
1 x SMART_PSU switch
1 x VGA switch
1 x VPP_I2C header
BMC LED Design
- 1 x BMC LED
- 1 x Message LED
- 1 x Location LED
BIOS 512 Mb Flash ROM, UEFI AMI BIOS(text-based)
Manageability WOL by PME, PXE
Accessories 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
Operating System Windows 11 , Windows 10 64-bit (with AMD Ryzen™ Desktop Processors)
Form Factor micro-ATX Form Factor
9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)