ASRock B450 Pro4 User Manual - Page 31
Expansion Slots (PCI Express Slots), PCIe Slot Configurations
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2.4 Expansion Slots (PCI Express Slots) There are 6 PCI Express slots on the motherboard. Before installing an expansion card, please make sure that the power supply is switched off or the power cord is unplugged. Please read the documentation of the expansion card and make necessary hardware settings for the card before you start the installation. PCIe slots: PCIE1 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards. PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards. PCIE3 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards. PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.* PCIE5 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards. PCIE6 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards. * If M2_1 is occupied, PCIE4 will be disabled. PCIe Slot Configurations Ryzen Series CPUs (Pinnacle Ridge) PCIE2 x16 PCIE4 x4 Ryzen Series CPUs (Summit Ridge) x16 x4 Ryzen Series CPUs (Raven Ridge) x8 x4 English 26