Micro ATX B660M is 230 x 244 mm. Micro ATX Business Motherboard equipped with Intel 12th Gen. CPU, MAX 65W Performance CPU and PCIE/onboard (reserve) GPU. Dual-channel DDR4 memory. Comes with Windows operation system and AMI BIOS. Storage is 4 x SATA Gen3 Port, 2 x M.2: M.2_A:2242/2280 support PCIE GEN3 X4/SATA, M.2_B:2242/2280 support PCIE GEN4 X4/optane. HD Audio IC, 5.1CH chipset for Audio. LAN is 1 x 1000M. Business motherboard supports HDMI, VGA and DP. IO: 4 x USB2.0, 2 x USB3.0, Onboard: 1 x USB2.0 pin or 1 x USB3.0 (2port), 1 x USB3.0 (2port), COM is optional. Plug-in: 1 x PCI Express4.0 x16 slot, PCI Express 3.0 x1 slot, 1*M.2-EKEY WIFI, 1 x CPU_FAN 4 Pin, 1 x SYS_FAN 4 Pin, 1 x AUX_FAN 4 Pin. ATX, 24 PIN +8 PIN power input.