ASUS Prime B450M-K II DDR4 AMD Motherboard

The ASUS Prime B450M-K II is a Micro-ATX motherboard built on the AMD B450 chipset, designed for AMD AM4 socket processors including 1st, 2nd, and 3rd Generation AMD Ryzen, as well as AMD Ryzen with Radeon Vega Graphics and AMD Athlon with Radeon Vega Graphics processors. It offers a dependable platform for first-time builders and upgraders looking for a compact, feature-complete foundation without unnecessary complexity. Memory support is handled through two DIMM slots accommodating up to 64GB of unbuffered DDR4 in dual-channel configuration. Native speeds start at DDR4-2133 and DDR4-2666, with overclocked profiles reaching up to DDR4-4400 (O.C.), subject to processor compatibility. ECC memory is supported in ECC mode depending on the installed CPU. Storage flexibility comes from a single M.2 Socket 3 (M key, 2242/2260/2280) running at up to PCIe 3.0 x4 speeds — reaching up to 32 Gbps — alongside four SATA 6 Gb/s ports with RAID 0, 1, and 10 support via the B450 chipset. Display output options include HDMI 2.0b, DVI-D, and D-Sub, driven by integrated graphics on compatible Ryzen APU and Athlon processors. Networking is handled by a Realtek RTL8111H Gigabit Ethernet controller, protected by ASUS LANGuard surge protection circuitry. The rear I/O panel provides four USB 3.2 Gen 1 Type-A ports, two USB 2.0 Type-A ports, three audio jacks, one RJ45 LAN port, a PS/2 combo port, and a BIOS FlashBack button for CPU-free BIOS updates. Internally, two USB 2.0 headers add four more ports, and one USB 3.2 Gen 1 header adds two additional ports, for a total of twelve USB connections. Audio is handled by a Realtek ALC887/897 codec delivering 7.1-channel High Definition Audio with up to 24-bit/192kHz playback. The audio circuit uses dedicated PCB layers, audio shielding, LED-illuminated trace paths, and Japanese audio capacitors for improved signal quality. ASUS 5X Protection III features include DIGI+ VRM digital power delivery, LANGuard, Overvoltage Protection, SafeSlot Core reinforced PCIe slot, and a stainless-steel back I/O panel. Cooling management is supported by one 4-pin CPU fan header and one 4-pin chassis fan header, both configurable through Fan Xpert software or the UEFI BIOS. Verified Specifications: - Form Factor: Micro-ATX, 22.6 cm x 22.1 cm (8.9 in x 8.7 in) - Socket: AMD AM4 - Chipset: AMD B450 - Memory: 2x DIMM, Max 64GB, DDR4-2133 to DDR4-4400 (O.C.), Dual Channel - Storage: 1x M.2 (PCIe 3.0 x4 / SATA, 2242/2260/2280), 4x SATA 6 Gb/s, RAID 0/1/10 - Display: 1x HDMI 2.0b, 1x DVI-D, 1x D-Sub - LAN: Realtek RTL8111H 1 Gb Ethernet - Audio: Realtek ALC887/897, 7.1-CH HD Audio, 24-bit/192kHz - USB (Rear): 4x USB 3.2 Gen 1 Type-A, 2x USB 2.0 - Expansion: 1x PCIe 3.0 x16, 2x PCIe 2.0 x1 - BIOS: 256 Mb Flash ROM, UEFI AMI BIOS, BIOS FlashBack - Warranty: 3 Years