ASRock B450M-HDV R4.0 AMD MotherboardASRock A320M-HDV R4.0 AMD Motherboard built in AMD AM4 Socket with AMD Promontory B450 chipset.This Motherboard supports SATA3 6Gb/s M.2 modules, and is compatible with ASRock’s U.2 Kit for installing some of the world’s fastest U.2 PCIe Gen3 x4 SSDs.Th..