The ASUS PRIME B660M-K D4 is an Intel B660 (LGA 1700) micro-ATX motherboard designed for 12th/13th Gen Intel Core processors. It features a 6+1+1 phase power design supporting DDR4 memory with 4 DIMM slots capable of up to 128GB capacity at 3200MHz(OC). The board includes PCIe 4.0 x16 slot for graphics and two M.2 slots (one PCIe 4.0 x4 and one PCIe 3.0 x4) for high-speed storage, along with 4 SATA 6Gbps ports. Display outputs feature HDMI 1.4 and D-Sub ports, while networking is handled by Realtek 1Gb Ethernet. Additional features include front panel USB 3.2 Gen 1 Type-A header, ASUS Lighting Control for RGB synchronization, Realtek ALC897 audio codec, and comprehensive cooling options with multiple fan headers. The motherboard also supports ASUS-exclusive features like AI Noise Cancellation, BIOS FlashBack, and Armoury Crate for system optimization.