ASROCK Rack WC621D8A-2T, Руководство пользователя

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2.5 Expansion Slots (PCI Express Slots)
There are 7 PCI Express slots on this motherboard.
PCIE slot:
PCIE1, PCIE3, PCIE5 and PCIE7 (PCIE 3.0 x16 slot, from CPU1) are used for PCI Express
x16 lane width graphics cards.
PCIE2, PCIE4 and PCIE6 (PCIE 3.0 x8 slot, from CPU1) are used for PCI Express x8 lane
width graphics cards.
Slot Generation Mechnical Eletrical Source
PCIE 1 3.0 x16 x16 CPU1
PCIE 2 3.0 x8 x8 CPU1
PCIE 3 3.0 x16 x16 CPU1
PCIE 4 3.0 x8 x8 CPU1
PCIE 5 3.0 x16 x16 CPU1
PCIE 6 3.0 x8 x8 CPU1
PCIE 6 3.0 x16 x16 CPU1
PCI Express Slot Configuration
No. PCIE 2 PCIE 3
Single Graphics Card x16
Two Graphics Cards x8 x8
No. PCIE 4 PCIE 5
Single Graphics Card x16
Two Graphics Cards x8 x8
No. PCIE 6 PCIE 7
Single Graphics Card x16
Two Graphics Cards x8 x8