ASRock B450M Pro4 Quick Installation Guide - Page 27
Expansion Slots PCI Express Slots
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B450M Pro4 2.4 Expansion Slots (PCI Express Slots) There are 3 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 x16 slot) is used for PCI Express x4 lane width graphics cards. PCIe Slot Configurations Ryzen Series CPUs (Pinnacle Ridge) Ryzen Series CPUs (Summit Ridge) Ryzen Series CPUs (Raven Ridge) PCIE1 x1 x1 x1 PCIE2 x16 x16 x8 PCIE3 x4 x4 x4 English 25
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