ASRock Z170A-X1/3.1 User Manual - Page 21
Expansion Slots (PCI Express Slots), PCIe Slot Configurations
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Z170A-X1/3.1 2.4 Expansion Slots (PCI Express Slots) There are 5 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 3.0 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 3.0 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 3.0 x1 slot) is used for PCI Express x1 lane width cards. PCIe Slot Configurations Single Graphics Card Two Graphics Cards in CrossFireXTM Mode PCIE2 x16 x16 PCIE4 N/A x4 For a better thermal environment, please connect a chassis fan to the motherboard's chassis fan connector (CHA_FAN1 or CHA_FAN2) when using multiple graphics cards. English 17
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