MSI MAG B660M Mortar Wifi DDR4 Intel Motherboard

The MSI MAG B660M Mortar WiFi DDR4 is a Micro-ATX motherboard built on the Intel B660 chipset, designed for 12th Generation Intel Core, Pentium Gold, and Celeron processors in the LGA1700 socket. Its compact 9.6 × 9.6-inch footprint makes it an ideal choice for space-efficient builds without sacrificing connectivity or performance headroom. Memory support spans four DDR4 slots with a maximum capacity of 128 GB. Standard JEDEC profiles run at 2133, 2666, and 3200 MHz, while Intel XMP overclocking can push a single-rank single-DIMM configuration beyond 4800 MHz. Dual-channel operation is supported across all configurations. Storage is handled by two PCIe 4.0 x4 M.2 slots — one fed directly from the CPU, one from the B660 chipset — plus six SATA 6 Gb/s ports, two of which come from an ASMedia ASM1061 controller. M.2 Shield Frozr thermal covers sit over both M.2 slots to manage drive temperatures and reduce thermal throttling. RAID 0, 1, 5, and 10 are available for B660-chipset SATA ports. Networking combines a Realtek RTL8125BG 2.5 Gbps wired LAN controller with an Intel Wi-Fi 6 module (pre-installed in the Key-E M.2 slot) supporting 802.11a/b/g/n/ac/ax on 2.4 GHz and 5 GHz bands, MU-MIMO TX/RX, BSS Color technology, speeds up to 2.4 Gbps, and Bluetooth 5.2. The rear I/O delivers a USB 3.2 Gen 2×2 (20 Gbps) Type-C port, three USB 3.2 Gen 2 (10 Gbps) Type-A ports, four USB 2.0 ports, HDMI 2.1 (4K 60 Hz with HDR), DisplayPort 1.4 (4K 60 Hz, HBR3), the 2.5G LAN jack, Wi-Fi antenna connectors, HD audio jacks, and an optical S/PDIF output. Internal headers add a 10 Gbps Type-C connector, two additional USB 3.2 Gen 1 (5 Gbps) ports, and four USB 2.0 ports. Expansion uses two PCIe x16-size slots: the primary (PCI_E1) from the CPU runs at PCIe 4.0 x16, and the secondary (PCI_E3) from the chipset operates at PCIe 3.0 x4. A single PCIe 3.0 x1 slot rounds out the lineup. Two-way AMD CrossFire is supported. Audio is managed by a Realtek ALC1200 codec delivering 7.1-channel HD audio with S/PDIF output. Lighting headers include one 4-pin RGB and two 3-pin ARGB connectors, plus four EZ Debug LEDs for quick fault diagnosis. The board ships with dual 8-pin ATX 12V power headers, an extended PWM heatsink over the VRM area, a water-pump fan header, two system fan headers, a TPM connector, and a Thunderbolt (RTD3) header. The warranty period is three years. Verifiable Specifications: • Form Factor: Micro-ATX, 244 mm × 244 mm • Socket / Chipset: LGA1700 / Intel B660 • CPU Support: 12th Gen Intel Core, Pentium Gold, Celeron • Memory: 4× DDR4, up to 128 GB; XMP OC up to 4800+ MHz (1DPC 1R) • M.2: 2× Key-M PCIe 4.0 x4 (with M.2 Shield Frozr) • SATA: 6× SATA 6 Gb/s • RAID: 0 / 1 / 5 / 10 (B660 chipset ports) • Primary PCIe: PCIe 4.0 x16 (CPU) • USB (rear): 1× 20 Gbps Type-C, 3× 10 Gbps Type-A, 4× USB 2.0 • Display: HDMI 2.1 + DisplayPort 1.4 (iGPU required) • LAN: Realtek 8125BG 2.5 Gbps • Wi-Fi: Intel Wi-Fi 6 (ax), up to 2.4 Gbps, BT 5.2 • Audio: Realtek ALC1200, 7.1-CH HD, S/PDIF out • Warranty: 3 Years