ASRock C621A WS Quick Installation Guide - Page 25
Expansion Slots PCI Express Slots
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C621A WS 2.5 Expansion Slots (PCI Express Slots) There are 7 PCIe slots on this motherboard. PCIE slot: PCIE1, PCIE3, PCIE5 and PCIE7 (PCIE 4.0 x16 slot, from CPU1) are used for PCIe x16 lane width cards. PCIE2, PCIE4 and PCIE6 (PCIE 4.0 x8 slot, from CPU1) are used for PCIe x8 lane width cards. Slot PCIE7 PCIE6 PCIE5 PCIE4 PCIE3 PCIE2 PCIE1 Generation 4.0 4.0 4.0 4.0 4.0 4.0 4.0 Mechanical x16 x8 x16 x8 x16 x8 x16 Electrical x16 x8 x16 x8 x16 x8 x16 Source CPU1 CPU1 CPU1 CPU1 CPU1 CPU1 CPU1 PCIe Slot Configurations Single PCIE Card PCIE2 N/A PCIE3 x16 Two PCIE Cards x8 x8 Single PCIE Card Two PCIE Cards PCIE4 N/A x8 PCIE5 x16 x8 Single PCIE Card Two PCIE Cards PCIE6 N/A x8 PCIE7 x16 x8 English 23
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C621A WS
23
English
2.5
Expansion Slots (PCI Express Slots)
°ere are 7 PCIe slots on this motherboard.
PCIE slot:
PCIE1, PCIE3, PCIE5 and PCIE7 (PCIE 4.0 x16 slot, from CPU1) are used for PCIe x16
lane width cards.
PCIE2, PCIE4 and PCIE6 (PCIE 4.0 x8 slot, from CPU1) are used for PCIe x8 lane width
cards.
Slot
Generation
Mechanical
Electrical
Source
PCIE7
4.0
x16
x16
CPU1
PCIE6
4.0
x8
x8
CPU1
PCIE5
4.0
x16
x16
CPU1
PCIE4
4.0
x8
x8
CPU1
PCIE3
4.0
x16
x16
CPU1
PCIE2
4.0
x8
x8
CPU1
PCIE1
4.0
x16
x16
CPU1
PCIe Slot Configurations
PCIE2
PCIE3
Single PCIE Card
N/A
x16
Two PCIE Cards
x8
x8
PCIE4
PCIE5
Single PCIE Card
N/A
x16
Two PCIE Cards
x8
x8
PCIE6
PCIE7
Single PCIE Card
N/A
x16
Two PCIE Cards
x8
x8