MSI MAG B660M Mortar DDR5 Intel Motherboard

The MSI MAG B660M Mortar DDR5 is a Micro-ATX motherboard built on the Intel B660 chipset and designed for Intel LGA1700-socket processors, including 12th Gen Intel Core, Pentium Gold, and Celeron series. Its Micro-ATX form factor measures 9.6 x 9.6 inches (24.4 x 24.4 cm), making it a compact yet feature-rich platform for gaming rigs and productivity workstations alike. The board ships with four DDR5 memory slots supporting up to 128 GB of non-ECC, unbuffered RAM. At stock JEDEC speeds, single-rank modules run at 4800 MHz; with Intel XMP 3.0 enabled, single-rank configurations can reach over 6200 MHz OC, while dual-rank single-DIMM configurations push past 5200 MHz OC. Dual-DIMM configurations are rated at 4000 MHz OC regardless of rank. Storage flexibility is strong. Two M.2 Key-M slots both operate at PCIe 4.0 x4, accommodating drives in 2242, 2260, and 2280 form factors. The first slot is routed directly from the CPU for maximum throughput, while the second is chipset-routed and also supports SATA 6Gb/s devices. A total of six SATA 6Gb/s ports round out storage options, and RAID 0, 1, 5, and 10 configurations are supported. M.2 Shield Frozr thermal covers help maintain consistent SSD performance under sustained loads. Connectivity is equally well-equipped. The rear I/O features a USB 3.2 Gen 2x2 Type-C port delivering 20 Gbps, three USB 3.2 Gen 2 Type-A ports at 10 Gbps, four USB 2.0 ports, an HDMI 2.1 output supporting 4K 60 Hz with HDR, and a DisplayPort 1.4 with HBR3 also rated at 4K 60 Hz. Network duties are handled by a Realtek 8125BG 2.5 Gbps LAN controller paired with MSI LAN Manager software for traffic prioritisation. Audio is powered by a Realtek ALC1200 codec delivering 7.1-channel HD audio with optical S/PDIF output. Fan control is handled via Total Fan Control software, which supports up to four temperature targets for automatic fan speed adjustment across the dedicated CPU, system, and water-pump headers. A 4-pin water-pump header rated for up to 3 A enables compatibility with popular AIO and custom liquid-cooling solutions. Additional headers include RGB and addressable RAINBOW LED connectors, EZ Debug LEDs, a TPM module connector, and a Thunderbolt (TBT) connector with RTD3 support. The primary PCIe x16 slot (CPU-routed) operates at PCIe 4.0 x16, while a second x16-length slot from the chipset runs at PCIe 3.0 x4. A PCIe 3.0 x1 slot is also available. Two-way AMD CrossFire multi-GPU configurations are supported. MSI backs the board with a 3-year warranty. Verified Specifications: - Form Factor: Micro-ATX, 9.6 x 9.6 in (24.4 x 24.4 cm) - Socket: LGA1700 | Chipset: Intel B660 - CPU Support: 12th Gen Intel Core, Pentium Gold, Celeron - Memory: 4x DDR5, up to 128 GB, XMP 3.0, up to 6200+ MHz OC (1DPC 1R) - M.2: 2x PCIe 4.0 x4 (M-Key, 2242/2260/2280) - SATA: 6x SATA 6Gb/s | RAID: 0/1/5/10 - USB: 1x USB 3.2 Gen 2x2 20Gbps Type-C (rear), 3x USB 3.2 Gen 2 10Gbps Type-A (rear), 4x USB 2.0 (rear) - Display: HDMI 2.1 (4K 60Hz HDR), DisplayPort 1.4 HBR3 (4K 60Hz) - LAN: Realtek 8125BG 2.5 Gbps - Audio: Realtek ALC1200, 7.1-channel HD, S/PDIF out - Warranty: 3 Years