Expansion Slots (Pci Express Slots) - ASROCK X399 Gaming User Manual

2.4 Expansion Slots (PCI Express Slots)

There are 5 PCI Express slots on the motherboard.
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.
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 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE5 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards.
PCIe Slot Configurations
Single Graphics Card
Two Graphics Cards in
CrossFireX
Mode
Three Graphics Cards in
3-Way CrossFireX
or 3-Way SLI
Four Graphics Cards in
4-Way CrossFireX
or 4-Way SLI
For a better thermal environment, please connect a chassis fan to the motherboard's |
chassis fan connector (CHA_FAN1, CHA_FAN2 or CHA_FAN3) when using multiple
graphics cards.
22
PCIE1
x16
TM TM
or SLI
x16
TM
Mode
x16
TM
Mode
TM Mode
x16
TM
Mode
PCIE2 PCIE4
N/A N/A
N/A x16
x8 x16
x8 x16
PCIE5
N/A
N/A
N/A
x8