CpuSupports amd ryzen 5000 & 3000 series desktop processors (not compatible with amd ryzen 5 3400g & ryzen 3 3200g) and amd ryzen 4000 g-series desktop processorsSee supported processorsChipsetAmd b550 chipsetMemory4x ddr4 memory slots, support up to 128gb 1Supports ddr4 1866/ 2133/ 2400/ 2667/ 2800/ 2933/ 3000/ 3066/ 3200 mhz by jedecSupports ddr4 2667/ 2800/ 2933/ 3000/ 3066/ 3200/ 3466/ 3600/ 3733 / 3866/ 4000/ 4133/ 4266/ 4400+ mhz by a-xmp oc mode1dpc 1r max speed 4400 mhz1dpc 2r max speed 3866 mhz2dpc 1r max speed 4000 mhz2dpc 2r max speed 3600 mhzDual channel memory architectureSupports non-ecc udimm memorySupports ecc udimm memory (non-ecc mode)Supports un-buffered memoryExpansion slots1x pcie 4.0/ 3.0 x16 slot (pcie1) 11x pcie 3.0 x16 slot (pcie3), supports x4 speed 22x pcie 3.0 x1 slotsOnboard graphics1x hdmi 2.1 port, supports a maximum resolution of 4096x2160 60hz 1 2Support hdcp 1.4 & 2.31x displayport, supports a maximum resolution of 4096x2160 60hz 1Maximum shared memory of 16 gbAvailable for the processor with integrated graphics.Graphics specifications may vary depending on the cpu installed.Multi-gpuSupports 2-way amd crossfire technologyStorageAmd b550 chipset6x sata 6gb/s ports2x m.2 slots (key m)M21 slot (from amd processor)Supports pcie 4.0/ 3.0 x4 1Supports sata 6gb/sSupports 2242/ 2260/ 2280/ 22110 storage devicesM22 slot (from amd b550 chipset)Supports pcie 3.0x4Supports 2242/ 2260/ 2280 storage devicesThe supported specification depends on installed processor.RaidSupports raid 0, raid 1 and raid 10 for sata storage devicesSupports raid 0 and raid 1 for m.2 nvme storage devicesUsbAmd b550 chipset3x usb 3.2 gen 1 5gbps ports (1 type-c internal connector, and 2 ports are available through the internal usb 3.2 gen 1 5gbps connector)8x usb 2.0 ports (4 type-a ports on the back panel, 4 ports through the internal usb 2.0 connectors)Amd processor2x usb 3.2 gen 2 10gbps ports (1 type-c port and 1 type-a port on the back panel)2x usb 3.2 gen 1 5gbps type-a ports on the back panelAudioRealtek alc892/alc897 codec7.1-channel high definition audioSupports s/pdif outputLan1x realtek 8111h gigabit lan controllerInternal connectors1x 24-pin atx main power connector1x 8-pin atx 12v power connector6x sata 6gb/s connectors2x m.2 slots (m-key)1x usb 3.2 gen 1 5gbps type-c port1x usb 3.2 gen 1 5gbps connector (supports additional 2 usb 3.2 gen 1 5gbps ports)2x usb 2.0 connectors (supports additional 4 usb 2.0 ports)1x 4-pin cpu fan connector1x 4-pin water-pump fan connector6x 4-pin system fan connectors1x front panel audio connector2x system panel connectors1x chassis intrusion connector1x 4-pin rgb led connector2x 3-pin rainbow led connectors1xtpm module connector1x clear cmos jumperBack panel portsPs/2 combo portDisplayportLan portUsb 3.2 gen 2 10gbps (type-a)Hd audio connectorsFlash bios buttonUsb 2.0HdmiUsb 2.0Usb 3.2 gen 1 5gbps (type-a)Usb 3.2 gen 2 10gbps (type-c)Optical s/pdif outMpg b550 gaming plusLed features1x ez led control switch4x ez debug ledI/o controllerNuvoton nct6687-r controller chipHardware monitorCpu/ system/ chipset temperature detectionCpu/ system/ pump fan speed detectionCpu/ system/ pump fan speed controlDimensionsAtx form factor12 in. X 9.6 in. (30.5 cm x 24.4 cm)Mounting9 mounting holes