ASRock B450M Steel Legend Quick Installation Guide - Page 27
Expansion Slots PCI Express Slots
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B450M Steel Legend 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) PCIE1 x1 PCIE2 x16 PCIE3 x4 Ryzen Series CPUs (Summit Ridge) x1 x16 x4 Ryzen Series CPUs (Raven Ridge) x1 x8 x4 Athlon series CPUs x1 x4 x4 For a better thermal environment, please connect a chassis fan to the motherboard's chassis fan connector (CHA_FAN1/WP, CHA_FAN2/WP or CHA_FAN3/WP) when using multiple graphics cards. English 25
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