ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors. The PRIME B850M-K motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It’s designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.

Build for the most advanced pc for gaming and creating

When only the fastest will do, ASUS motherboards deliver. With faster dual-channel DDR5 memory support, AMD EXPO™ technology and PCIe® 5.0 support for both graphics and NVMe, you can play the most demanding games and deliver your biggest projects with the revolutionary performance of an ASUS motherboard and AMD Ryzen™ 9000, 8000, and 7000 Series processors.

SPECIFICATIONS

• CPU
  • AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors*
  • * Refer to the latest ASUS CPU support list.
• Chipset: AMD B850 Chipset
• Memory
  • 2x DDR5 DIMM slots
  • Max. 128GB
  • Supports up to 8400+MT/s (OC)
  • ECC and Non-ECC Un-buffered DIMM*
  • Dual channel memory architecture
  • Supports AMD Extended Profiles for Overclocking (EXPO™)
  • ASUS Enhanced Memory Profile (AEMP)
  • * Adjustments will be made based on the specifications of mass-produced memory products available on the market.
  • * 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 the latest ASUS Memory Support list.
  • * Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
• Graphics
  • 1x DisplayPort**
  • 1x HDMI™ port***  
  • * 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*
    • 1x PCIe 5.0 x16 slot (supports x16 mode)
  • AMD Ryzen™ 8000 Series Desktop Processors
    • 1x PCIe 4.0 x16 slot (supports x8/x4 mode)**
  • AMD B850 Chipset
    • 1x PCIe 4.0 x16 slot (support x4 mode)
  • * Please check the PCIe bifurcation table on the ASUS support site.
  • ** Specifications vary by CPU types.
  • - To ensure compatibility of the device installed, please refer to ASUS list of supported peripherals.
• Storage
  • Total supports 2x M.2 slots and 4x SATA 6Gb/s ports*
  • AMD Ryzen™ 9000 & 7000 Series Desktop Processors
    • M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode)
    • M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 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 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)*
  • AMD B850 Chipset
    • 4x SATA 6Gb/s ports
  • * Specifications vary by CPU types.
  • 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
• Ethernet: 1x Realtek 2.5Gb Ethernet with TUF LANGuard
• USB
  • Rear USB (Total 8 ports)
    • 2x USB 10Gbps ports (2 x Type-A)
    • 2x USB 5Gbps ports (2 x Type-A)
    • 4x USB 2.0 ports (4 x Type-A)
  • Front USB (Total 7 ports)
    • 1x USB 5Gbps connector (supports USB Type-C®)
    • 1x USB 5Gbps header supports 2 additional USB 5Gbps ports
    • 2x USB 2.0 headers support 4 additional USB 2.0 ports
  • * USB Type-C® power delivery output: max. 5V/3A.
• Audio: Realtek 7.1 Surround Sound High Definition Audio CODEC
• Operating System Support: Windows 11, Windows 10 64-bit
• Form Factor: micro-ATX (24.4 x 22.1 cm)
• Warranty: 36 months

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