ASROCK EP2C621D24LM-AB, Руководство пользователя

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2.5 Expansion Slots (PCI Express Slots)
There are 3 PCI Express slots on this motherboard.
PCIE slots:
PCIE1 (PCIE 3.0 x16 slot, from CPU1) is used for PCI Express x16 lane width cards.
PCIE2 (PCIE 3.0 x16 slot, from CPU2) is used for PCI Express x16 lane width cards.
PCIE3 (PCIE 3.0 x8 slot, from CPU2) is used for PCI Express x8 lane width cards.
Slot Generation Mechanical Electrical Source
PCIE1 3.0 x16 x16 CPU1
PCIE2 3.0 x16 x16 CPU2
PCIE3 3.0 x8 x8 CPU2
Installing an expansion card
Step 1. 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.
Step 2. Remove the system unit cover (if your motherboard is already installed
in a chassis).
Step 3. Remove the bracket facing the slot that you intend to use. Keep the
screws for later use.
Step 4. Align the card connector with the slot and press firmly until the card is
completely seated on the slot.
Step 5. Fasten the card to the chassis with screws.
Step 6. Replace the system cover.