Free items are subject to availability, please check this is added to your basket on check out. AMD AM4 socket: Ready for 3rd Gen AMD Ryzen(TM) processors Comprehensive cooling: PCH heatsink and Fan Xpert 2 Ultrafast connectivity: Dual M. 2, PCIe 4. 0, 1 Gb Ethernet, USB 3. 2 Gen 2 Type-a 5X Protection III: Multiple hardware safeguards for all-around system protection ASUS Prime series is expertly engineered to unleash the full potential of 3rd Generation AMD Ryzen platform. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, Prime B550 series motherboards provide daily users and DIY PC builders a range of performance tuning options via intuitive software and firmware features. Cooler by Design Prime B550M-K is engineered with an array of hybrid fan headers and features comprehensive cooling controls that are configurable via Fan Xpert 2+ software or via the UEFI BIOS, ensuring your rig stays cool and stable under intense workloads. Each header can dynamically reference three thermal sensors. Fan Xpert 2+ allows you to map the temperature of supported ASUS graphics cards to optimise cooling for GPU- and CPU-intensive tasks. PCIe 4. 0 M. 2 (up to 64 Gbps) Achieve speed with onboard M. 2 PCIe 4. 0 M. 2 Slot supports up to 22110 and provide NVMe SSD RAID support for an incredible performance boost. Create a RAID configuration with up to PCIe 4. 0 storage device to enjoy the fastest data-transfer speeds on the 3rd Generation AMD Ryzen platform. Little Things Make a Big Difference Prime B550 series adds the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive RGB lighting controls that let you customise your system to create a uniquely personal look.