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ASUS 90MB1MN0-M0VAY0 mATX Motherboard for AMD AM5 CPUs
The ASUS Pro WS B850M-ACE SE is a powerful and reliable motherboard made for professionals, creators, and anyone who needs strong performance in a smaller PC build. Built with the latest AMD B850 chipset and AM5 socket, it supports the newest AMD Ryzen™ 7000, 8000, and 9000 series processors — giving you fast speeds, smooth multitasking, and long-term upgrade potential.
This workstation-grade board is designed to handle demanding tasks like video editing, 3D design, engineering, and data work. With support for up to 256 GB of high-speed DDR5 memory, your system can easily manage heavy workloads without slowing down.
For storage, it includes two M.2 slots that can run at PCIe 5.0 speeds for ultra-fast SSDs, plus four SATA ports for traditional drives. That means quicker boot times, faster file transfers, and plenty of room for your projects.
Connectivity is another strong point — the board offers three network ports, including 10 Gigabit and 2.5 Gigabit Ethernet, giving you high-speed and stable connections for data-intensive jobs or networked workspaces. It also has a dedicated management port, allowing remote monitoring and maintenance if used in a professional setting.
On the back, you’ll find a wide selection of USB-C and USB-A ports for fast data transfer, along with HDMI, DisplayPort, and VGA outputs to support different types of displays.
Built to workstation standards, the Pro WS B850M-ACE SE features high-quality components, advanced cooling support, and ASUS’s trusted protection systems to keep your hardware running safely and efficiently over time.
CPU
- Installed Processors (Max): 1 x AMD Socket AM5 processor (Ryzen 9000 / 8000 / 7000 or EPYC 4005)
- CPU Family: AMD Ryzen 9000 / 8000 / 7000 Series, AMD EPYC 4005 Series
Rear Panel I/O Ports
- Audio Line Out Ports: 2 x Audio jacks (rear panel)
- Microphone In Port: Shared combo audio jack (front panel support)
CPU
- CPU Speed: Depends on installed CPU (supports full AMD Ryzen 9000 / 8000 / 7000 series base and boost clocks)
- L1 Cache: Depends on installed CPU
- L2 Cache: Depends on installed CPU
- L3 Cache: Depends on installed CPU
- Supported Processor Manufacturer: AMD
- Supported Processors: AMD Ryzen 9000, 8000, 7000 Series and AMD EPYC 4005 Series (Socket AM5)
- Socket: AMD Socket AM5
- Hyperthreading Architecture: Supported (depends on CPU)
Physical
- Form Factor: Micro-ATX
CPU
- 64-bit Support: Yes
- Socket: 1 x AMD Socket AM5
- Maximum CPU Speed: Depends on installed processor (supports Ryzen boost speeds up to 5.7 GHz+)
- Maximum Bus Speed: PCIe 5.0 x16 / DDR5 up to 8000+ MT/s (OC)
Rear Panel I/O Ports
- USB Ports: Rear: 7 (5 x USB 10 Gbps, 2 x USB 2.0) / Front: 7 (1 x USB 20 Gbps Type-C, 1 x USB 5 Gbps header = 2 ports, 2 x USB 2.0 headers = 4 ports)
- DisplayPorts: 1 x DisplayPort 1.4 (max 8K@30 Hz) + DisplayPort output via USB-C port
- HDMI Port: 1 x HDMI 2.1 (4K@60 Hz)
- VGA Port: 1 x VGA (from AST2600 BMC)
Internal I/O Connectors
- SATA Connectors: 4 x SATA 6 Gb/s ports (share bandwidth with U.2 port)
- USB Connectors: 1 x USB 20 Gbps (Type-C), 1 x USB 5 Gbps header (2 ports), 2 x USB 2.0 headers (4 ports)
Memory
- Memory Bus Speed: Up to 8000+ MT/s (OC) with Ryzen 9000/8000/7000 CPUs / Up to 5600 MT/s with EPYC 4005
- Memory Type: DDR5 ECC & Non-ECC Un-buffered DIMMs (dual-channel)
Compliance
- Certifications: CE, FCC, RoHS, REACH, WEEE
Electrical
- Power Requirements: ATX power supply, 24-pin + 8-pin + 4-pin 12V connectors
- Power Connector: 1 x 24-pin ATX main, 1 x 8-pin +12V CPU, 1 x 4-pin +12V CPU
Physical
- Colour: Black / Silver
Motherboard
- Chipset Manufacturer: AMD
- Northbridge: AMD B850 Chipset
- Southbridge: AMD B850 Chipset
- Input/Output Controller: Integrated I/O with ASUS 5X Protection III (DIGI+ VRM, SafeSlot, ESD Guards, etc.)
- RAID Supported: Yes (AMD RAIDXpert2)
- RAID Format: RAID 0 / 1 / 5 / 10 (varies by CPU)
- RAID Controllers: Integrated AMD RAID Controller
- SATA Supported: Yes (SATA 6 Gb/s)
- SATA Controllers: 1 x Integrated AMD B850 SATA Controller
Rear Panel I/O Ports
- Serial Ports: 1 x COM header (onboard)
- USB Port(s): Rear: 7 (5 x USB 10 Gbps, 2 x USB 2.0) / Front: 7 (1 x USB 20 Gbps Type-C, 1 x USB 5 Gbps header = 2 ports, 2 x USB 2.0 headers = 4 ports)
- RJ-45 Ports: 3 x RJ-45 (1 x Realtek 10 Gb LAN, 1 x Intel 2.5 Gb LAN, 1 x Realtek 1 Gb management LAN)
- DisplayPort(s): 1 x DisplayPort 1.4 (8K@30 Hz) + 1 x USB-C with DisplayPort output
- HDMI Port(s): 1 x HDMI 2.1 (4K@60 Hz)
- VGA Port(s): 1 x VGA (from AST2600 BMC)
- Digital Port: USB Type-C DisplayPort output supported
- Serial ATA Ports: 4 x SATA 6 Gb/s ports (shared with U.2 when enabled)
- Audio Line In Ports: Supported via front panel audio connector
- Audio Line Out Ports: 2 x Audio jacks (rear panel)
- Microphone In Port: Supported via front panel audio connector
- Graphics Card Port: 1 x PCIe 5.0 x16 slot (Ryzen 9000/7000/EPYC 4005) or PCIe 4.0 x16 (Ryzen 8000)
Internal I/O Connectors
- Front Panel Connectors: 1 x 10-1 pin Front Panel System header, 1 x Front Panel Audio header
- Cooling Fan Support: 1 x CPU fan, 1 x CPU OPT fan, 3 x Chassis fans, 1 x W_PUMP+ header
- Auxiliary Audio Support: Front panel audio header supported
- SATA Connector(s): 4 x SATA 6 Gb/s ports
- USB Connector(s): 1 x USB 20 Gbps Type-C, 1 x USB 5 Gbps header (2 ports), 2 x USB 2.0 headers (4 ports), 1 x USB 2.0 BIOS FlashBack port
- Thunderbolt Port(s): 1 x Thunderbolt (USB4) header
- RJ-45 Connectors: 3 x onboard RJ-45 (10 Gb, 2.5 Gb, 1 Gb management)
- Serial Connectors: 1 x COM header (onboard)
- Chassis Intrusion Connector: 1 x Chassis intrusion header
- TPM Header: 1 x SPI TPM header (14-1 pin)
- Power Connector Port: 1 x 24-pin ATX main power, 1 x 8-pin +12V CPU power, 1 x 4-pin +12V CPU power
- Other Connectors: 1 x Thunderbolt (USB4) header, 1 x COM header, 1 x Front panel header, 1 x Reset button, 1 x Start button, 1 x Thermal sensor header
Expansion
- Number of PCI Slots: 2
- PCI Slot Type: PCIe 5.0 x16 and PCIe 4.0 x16 (wired x4)
- Number of PCI Express Slots: 2
- PCI Express 4.0 Slot Type: 1 x PCIe 4.0 x16 (wired x4, from chipset)
- PCI Express X16 Slots: 2 x PCIe x16 (1 x PCIe 5.0 x16 CPU slot, 1 x PCIe 4.0 x16 chipset slot wired x4)
- PCI Express Slot Type: 1 x PCIe 5.0 x16, 1 x PCIe 4.0 x4
- Other Expansion Slots: 1 x MCIO connector, 1 x U.2 connector
Memory
- Maximum RAM: 256 GB
- Memory Type(s): DDR5 ECC & Non-ECC Un-buffered DIMMs
- Memory Bus Speed Range: 5600 MT/s - 8000+ MT/s (OC)
- Memory Bus Speed Minimum: 5600 MT/s
- Memory Bus Speed Maximum: 8000+ MT/s (OC)
- Memory Bus Speeds Supported: 5600 / 6000 / 6400 / 7200 / 7600 / 8000+ MT/s
- Memory Expansion Options: 4 x DIMM slots, dual-channel, up to 256 GB total
- Memory Slot: 4 x DDR5 DIMM slots
Graphics Device
- Integrated Graphics Supported: Yes (depends on installed AMD Ryzen CPU with integrated Radeon Graphics)
Sound
- Integrated Sound: Realtek 7.1 Surround HD Audio CODEC (24-bit/192 kHz playback)
Graphics Device
- Graphics Chipset Manufacturer: AMD
- Graphics Chipset Model Name: Integrated Radeon Graphics (on supported Ryzen CPUs)
- Graphics Chipset Model Number: Depends on installed CPU (e.g. Radeon 700M/780M for Ryzen 8000G Series)
- Graphics Memory: Shared system memory
- Graphics Memory Type: DDR5 (shared)
Sound
- Integrated Sound: Realtek 7.1 Surround HD Audio CODEC (24-bit/192 kHz playback)
Warranty
- Warranty: 3 Years Manufacturer Warranty
Network
- Integrated Network: 1 x Realtek 10 Gb Ethernet, 1 x Intel 2.5 Gb Ethernet, 1 x Realtek 1 Gb management LAN
- Network Speeds Supported: 10 Gb/s, 2.5 Gb/s, 1 Gb/s
System Requirements
- Operating Systems Supported: Windows 11 64-bit, Windows 10 64-bit (with Ryzen CPUs)
System
- BIOS: 512 Mb UEFI AMI BIOS (text-based), supports BIOS FlashBack and EZ Flash Utility
- Special Features: ASUS 5X Protection III, Q-Design, BIOS FlashBack, IPMI/BMC remote management, PCIe 5.0, DDR5, 10Gb & 2.5Gb LAN
- Jumpers: 1 x Clear CMOS button, 1 x BMC switch, 1 x VGA switch, 1 x SMART_PSU switch
- Software Included: Armoury Crate, Fan Xpert 4, ASUS DriverHub, ASUS CPU-Z, TurboV Core, Norton 360 (60-day trial), WinRAR (40-day trial), Adobe Creative Cloud (free trial)
- Drivers: Included via ASUS DriverHub and support site
- Overclocking Features: Supports AMD EXPO profiles, DDR5 OC up to 8000+ MT/s, BIOS-level CPU and memory tuning
Compliance
- Certification(s): CE, FCC, RoHS, REACH, WEEE
Electrical
- Power Requirement(s): ATX 24-pin main power, 8-pin +12V CPU, 4-pin +12V CPU
- Power Connector(s): 1 x 24-pin ATX, 1 x 8-pin +12V CPU, 1 x 4-pin +12V CPU
- Power Management: ACPI-compliant power management, BMC SMART_PSU monitoring
Environmental
- Operating Temperature: 0øC - 50øC
- Operating Humidity: 10% - 90% (non-condensing)
Physical
- Form Factor: Micro-ATX (24.4 cm x 24.4 cm)
- In The Box: 2 x SATA 6 Gb/s cables, I/O shield, Q-Connector, M.2 rubber package, ASUS Control Center Express key card, Quick start guide
- Width: 24.4 cm
- Length: 24.4 cm
- Weight: Approx. 1.1 kg
- Colour(s): Black / Silver
Identifiers
- Stock Code: MBD3970
- Mfg Code: Pro WS B850M-ACE SE
Warranty
- Warranty: 3 Years Manufacturer Warranty
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Promotional Period: From Wednesday 24th June, whilst stocks last.
