ASRock X99 WS User Manual - Page 24
Expansion Slots (PCI Express Slots), Two Graphics Cards
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2.4 Expansion Slots (PCI Express Slots) here are 6 PCI Express slots on the motherboard. Before installing an expansion card, please make sure that the power supply is switched of 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 x16 slot) is used for PCI Express x16 lane width graphics cards. PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards. PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards. PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards. PCIE5 (PCIe 2.0 x16 slot) is used for PCI Express x4 lane width graphics cards. PCIE6 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards. * If M.2 PCI Express module is installed, PCIE3 will be disabled. PCIe Slot Conigurations (For CPU with 40 PCIe lanes) Single Graphics Card PCIE1 PCIE2 PCIE3 PCIE4 PCIE5 PCIE6 x16 N/A N/A N/A N/A N/A Two Graphics Cards in CrossFireXTM or SLITM Mode x16 N/A N/A x16 N/A N/A hree Graphics Cards in 3-Way CrossFireXTM Mode x8 or 3-Way SLITM Mode x8 N/A x16 N/A N/A Four Graphics Cards in 4-Way CrossFireXTM Mode x8 or 4-Way SLITM Mode x8 N/A x8 N/A x8 English 18
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