AM4 Sockets Supported, assistance PCIe 4.0 on X570 as well as B550 motherboards, supplying double the graphics transmission capacity. Large GameCache memory onboard for greater video game efficiency. MSI B550-A PRO ATX Motherboard: ATX type element, AM4 Socket, Supports DDR4 Memory, Dual Memory Channel, with 1 x PCIe 4.0 Slot, 2 x M. 2 Slots, 6 X SATA III Slots, USB 3.2 Gen 2 Type-C Ready, HDMI, Lightning Gen4 x4 M. 2 with M. 2 Shield Frozr, Intel Turbo USB 3.2 Gen 2, Audio Boost, Multi-GPU, With Steel shield PCI-E ports.
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