Supports AMD EPYC 7003 and 7002 Series Processors. A BIOS update is required to support AMD EPYC 7003 Series Processors. ASRock Rack. Socket SP3. 1U Rackmount. Front:Supports 3 FHFL dual-slot (PCIe4.0 x16) via 1U4G_SL2P_L_RDV and 1U4G_SL2P_R_RDVRear:Supports 1 FHFL dual-slot PCIe4.0 x16 via 1U4G_SL2P_L_RDVSupports 2 low-profile PCIe4.0 x16 via RB1UX16_G4 GPU cards with power connector on the top edge are not supported.