GIGABYTE B660M D3H DDR4 Intel Motherboard

The GIGABYTE B660M D3H DDR4 is a Micro ATX motherboard built on the Intel B660 Express Chipset, designed for 12th Generation Intel Core, Pentium Gold, and Celeron processors in the LGA1700 socket. Measuring 24.4 cm × 24.4 cm, it fits a wide range of mid-tower and compact cases while delivering a feature set typically associated with larger form factors. Power delivery is handled by a 6+2+1-phase Hybrid Digital VRM equipped with low RDS MOSFETs and a dedicated MOS heatsink, helping maintain stable voltage to the CPU under sustained workloads. An 8-pin solid-pin CPU power connector supports the increased power demands of 12th Gen processors. Memory support spans four DDR4 DIMM slots in dual-channel configuration, accommodating up to 128 GB of non-ECC unbuffered DDR4. XMP profiles up to 5333 MHz are supported, making it straightforward to unlock the rated speed of compatible XMP memory kits by enabling the XMP setting in BIOS. Storage is well catered for: two M.2 slots each run at PCIe 4.0 x4, and both are covered by GIGABYTE’s M.2 Thermal Guard heatsinks to reduce SSD throttling under sustained transfers. Four SATA 6 Gb/s ports round out internal storage, with RAID 0, 1, 5, and 10 modes available. Networking is handled by an Intel 2.5GbE LAN chip supporting 10/100/1000/2500 Mbps speeds with bandwidth management software. Rear connectivity includes one USB 3.2 Gen 2 Type-C port, one USB 3.2 Gen 2 Type-A port, two USB 3.2 Gen 1 ports, two USB 2.0 ports, one PS/2 combo port, two DisplayPort outputs, one HDMI port, and six 3.5 mm audio jacks fed by a Realtek audio codec capable of 2/4/5.1/7.1-channel output. Expansion slots comprise one PCIe x16 slot (running at x16), one PCIe x16 slot (running at x4), one PCIe x1 slot, and one legacy PCI slot. Onboard RGB FUSION 2.0 supports addressable LED and standard RGB headers. Smart Fan 6 provides multi-sensor fan control with hybrid headers and FAN STOP capability. Q-Flash Plus allows BIOS updates from a USB drive without a CPU, memory, or GPU installed — a useful feature during initial builds. Verified Specifications: • Chipset: Intel B660 Express • Socket: LGA1700 • Supported CPUs: 12th Gen Intel Core, Pentium Gold, Celeron • Memory: 4 × DDR4 DIMM, dual-channel, up to 128 GB, XMP up to 5333 MHz • Form Factor: Micro ATX, 24.4 cm × 24.4 cm • M.2 Slots: 2 × PCIe 4.0 x4 with Thermal Guard • SATA: 4 × SATA 6 Gb/s; RAID 0/1/5/10 • LAN: Intel 2.5GbE (10/100/1000/2500 Mbps) • Rear USB: 1 × USB 3.2 Gen 2 Type-C, 1 × USB 3.2 Gen 2 Type-A, 2 × USB 3.2 Gen 1, 2 × USB 2.0 • Display: 2 × DisplayPort, 1 × HDMI • Audio: Realtek CODEC, 7.1-channel, 6 audio jacks • VRM: 6+2+1-phase Hybrid Digital with MOS heatsink