ASUS Prime B660 Plus DDR4 Intel Motherboard

The ASUS Prime B660-Plus D4 is an ATX-form-factor motherboard built on the Intel B660 chipset and designed for Intel's LGA 1700 socket. It supports 12th Generation Intel Core processors as well as Pentium Gold and Celeron models, and is compatible with both Intel Turbo Boost Technology 2.0 and Intel Turbo Boost Max Technology 3.0. Memory support spans four DIMM slots accommodating up to 128 GB of non-ECC, unbuffered DDR4 RAM. Speeds range from DDR4-2133 at native JEDEC up to DDR4-5066 in overclocked profiles, with dual-channel architecture and Intel XMP profile support via ASUS OptiMem tuning. Storage is handled by three M.2 Key-M slots. The primary M.2_1 slot runs at PCIe 4.0 x4 when paired with a 12th Gen Intel processor. The M.2_2 slot, driven by the B660 chipset, also supports PCIe 4.0 x4 and accepts drives up to 110 mm (22110 form factor). The third M.2_3 slot supports PCIe 4.0 x2 mode. Four SATA 6 Gb/s ports are also available. Each M.2 slot benefits from an included heatsink to reduce thermal throttling during sustained read/write operations. Expansion slots include one PCIe 4.0 x16 slot sourced from the 12th Gen CPU, one chipset-driven PCIe 3.0 x16 slot running at x4 electrical bandwidth, and two PCIe 3.0 x1 slots. The primary PCIe x16 slot uses ASUS SafeSlot reinforcement — a metal-sheathed design — to secure heavier graphics cards. Networking is provided by a Realtek-powered Intel 2.5 Gb Ethernet port protected by ASUS LANGuard surge protection. Wireless connectivity requires an optional CNVi or PCIe module installed in the Key-E M.2 slot; no Wi-Fi adapter is included. The rear I/O panel features six USB ports: one USB 3.2 Gen 2×2 Type-C (up to 20 Gbps), two USB 3.2 Gen 2 Type-A (10 Gbps each), one USB 3.2 Gen 1 Type-A (5 Gbps), and two USB 2.0 Type-A ports. Video output options include HDMI, DisplayPort, and D-Sub for use with processors featuring integrated graphics. Audio is delivered by a Realtek HD Audio CODEC supporting 7.1 surround sound and up to 24-bit/192 kHz playback. For cooling and system management, the board carries one 4-pin CPU fan header, one 4-pin AIO pump header, and three 4-pin chassis fan headers, all configurable through ASUS Fan Xpert 4 or the UEFI BIOS. RGB and addressable lighting are supported via two AURA RGB headers and three Addressable Gen 2 headers. A Thunderbolt header, SPI TPM header, and Q-LED diagnostic LEDs round out the feature set. Protection features include overvoltage protection, DRAM overcurrent protection, and a stainless-steel back I/O shield. Verified Specifications: - Form Factor: ATX (305 mm × 244 mm) - Socket: Intel LGA 1700 - Chipset: Intel B660 - CPU Support: 12th Gen Intel Core, Pentium Gold, Celeron - Memory: 4× DIMM, Max 128 GB, DDR4 (up to 5066 MHz OC), Dual Channel, XMP - Storage: 3× M.2 PCIe 4.0 (Key M) + 4× SATA 6 Gb/s - PCIe: 1× PCIe 4.0 x16, 1× PCIe 3.0 x16 (x4 mode), 2× PCIe 3.0 x1 - Ethernet: 1× 2.5 Gb (Realtek/Intel), ASUS LANGuard - Rear USB: 1× USB 3.2 Gen 2×2 Type-C, 2× USB 3.2 Gen 2 Type-A, 1× USB 3.2 Gen 1 Type-A, 2× USB 2.0 - Display Output: HDMI, DisplayPort, D-Sub - Audio: Realtek 7.1 HD Audio, 24-bit/192 kHz - Warranty: 3 Years (Brand) - Part Number: 90MB18X0-M0IAY0 - Country of Origin: China