Description

ASUS PRIME B850M-K Micro-ATX Motherboard

The ASUS PRIME B850M-K is designed to maximize the performance of AMD Ryzen™ 9000, 8000, and 7000 Series desktop processors while providing long-term reliability and advanced AI PC readiness. Featuring an 8+2+1 phase digital power design, DDR5 support with ASUS Enhanced Memory Profile (AEMP) and AMD EXPO™, plus PCIe® 5.0 for next-gen graphics and storage, this motherboard balances performance, efficiency, and value.

It includes ASUS AI Solutions such as AI Cache Boost, enabling up to 29% faster local LLM (Large Language Model) performance, and AI Advisor for intuitive PC performance guidance. With dual M.2 slots (PCIe 5.0 and PCIe 4.0), Realtek 2.5Gb Ethernet, and comprehensive USB connectivity including USB 10Gbps and USB 5Gbps Type-C®, it ensures fast data transfers and robust networking.

The PRIME B850M-K also incorporates Fan Xpert 2+ software and multiple cooling solutions for optimal system stability, while Aura Sync RGB lighting with Gen 2 headers enables full system personalization. DIY-friendly features like BIOS FlashBack™, Q-LED Core, and SafeSlot make building easier and safer.

This makes the ASUS PRIME B850M-K a strong choice for PC builders who need AI-capable performance, flexibility, and reliable connectivity in a compact micro-ATX form factor.

 

Features

 

  • Advanced AI-ready motherboard for AMD Ryzen™ 9000 / 8000 / 7000 Series processors

  • 8+2+1 phase digital power design for stable CPU performance

  • Supports DDR5 memory with AEMP and EXPO™ profiles, up to 8400+ MT/s OC

  • Dual M.2 slots: PCIe 5.0 x4 (128 Gbps) + PCIe 4.0 x4

  • Realtek 2.5Gb Ethernet for faster networking

  • USB 10Gbps Type-A + USB 5Gbps Type-C® ports for rapid data transfers

  • ASUS AI Cache Boost & AI Advisor for enhanced AI performance and guidance

  • Fan Xpert 2+ with smart cooling controls

  • Aura Sync RGB with Gen 2 headers for full lighting customization

  • DIY features: BIOS FlashBack™, SafeSlot, Q-LED Core

 

Specifications

 

CategoriesDetails
ModelASUS PRIME B850M-K
Form Factormicro-ATX (24.4 cm x 22.1 cm)
CPU SupportAMD Socket AM5: Ryzen™ 9000, 8000, 7000 Series
ChipsetAMD B850
Memory2 x DIMM, DDR5 up to 128GB, Dual Channel, AEMP & EXPO™ support, up to 8400+MT/s OC
Expansion Slots1 x PCIe 5.0 x16, 1 x PCIe 4.0 x16 (x4 mode)
Storage2 x M.2 (PCIe 5.0 x4, PCIe 4.0 x4), 4 x SATA 6Gb/s
NetworkingRealtek 2.5Gb Ethernet, ASUS LANGuard
USB (Rear)2 x USB 10Gbps Type-A, 2 x USB 5Gbps Type-A, 4 x USB 2.0
USB (Front)1 x USB 5Gbps Type-C®, 2 x USB 5Gbps (via header), 4 x USB 2.0 (via headers)
Graphics Outputs1 x HDMI (4K@60Hz), 1 x DisplayPort (8K@30Hz)
AudioRealtek 7.1 Surround HD Audio CODEC, 24-bit/192kHz playback
Cooling Headers1 x CPU Fan, 3 x Chassis Fan, AIO Pump support
RGB Headers3 x Addressable RGB Gen 2 headers
Special FeaturesBIOS FlashBack™, SafeSlot, DIGI+ VRM, Fan Xpert 2+, Armoury Crate, AI Advisor
Back Panel I/O2 x USB 10Gbps, 2 x USB 5Gbps, 4 x USB 2.0, 1 x HDMI, 1 x DisplayPort, 1 x RJ-45 (2.5GbE), 3 x Audio jacks, BIOS FlashBack™ button, 1 x PS/2
Accessories2 x SATA cables, I/O shield, M.2 accessories, Quick start guide
OS SupportWindows 11, Windows 10 64-bit
 
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