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CPU:AMD AM4 Socket for AMD Ryzen™ 5000 Series/ 4000 G-Series/ 3000 Series Desktop ProcessorsChipset: AMD B550Memory: AMD RyzenTM 4000 G-Series Processors 4 x DIMM, Max. 128GB, DDR4 5100(O.C)/4800(O.C.)/4600(O.C)/4400(O.C)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3600(O.C.)/3466(O.C.)/3200/3000/2800/2666/2400/2133 MHz Memory 4 x DIMM, Max. 128GB, DDR4 4600(O.C)/4400(O.C)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3600(O.C.)/3466(O.C.)/3200/3000/2800/2666/2400/2133 MHz Un-buffered Memory OptiMem II Dual Channel Memory Architecture ECC Memory (ECC mode) support varies by CPUGraphic : 1 x HDMI 2.1(4K@60HZ) 1 x DisplayPort 1.2LAN: Intel® I225-V 2.5Gb Ethernet ASUS LANGuardExpansion Slots : AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors AMD B550 Chipset 1 x PCIe 3.0 x16 (x4 mode) * 3 x PCIe 3.0 x1 1 x PCIe 3.0 x16 (x16 mode) 1 x PCIe 4.0 x16 (x16 mode)Operating System: Windows® 10 64-bitForm Factor: ATX Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )