ASROCK B660 Steel Legend, Руководство пользователя

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2.4 Expansion Slots (PCIe Slots)
There are 4 PCIe slots on the motherboard.
PCIe slots:
PCIE1 (PCIe 5.0 x16 slot) is used for PCIe x16 lane width graphics cards.
PCIE2 (PCIe 3.0 x1 slot) is used for PCIe x1 lane width cards.
PCIE3 (PCIe 4.0 x16 slot) is used for PCIe x2 lane width graphics cards.
PCIE4 (PCIe 3.0 x1 slot) is used for PCIe x1 lane width cards.
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.
For a better thermal environment, please connect a chassis fan to the motherboard’s
chassis fan connector (CHA_FAN1~5/WP) when using multiple graphics cards.