2.5 Expansion Slots (PCI Express Slots)
There are 3 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 x16 lane width graphics cards.
PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIe Slot Configurations
Single Graphics Card
Two Graphics Cards in
TM
CrossFireX
or SLI
Mode
Three Graphics Cards in
TM
3-Way CrossFireX
TM
or 3-Way SLI
Mode
For a better thermal environment, please connect a chassis fan to the motherboard's
chassis fan connector (CHA_FAN1/WP, CHA_FAN2/WP or CHA_FAN3/WP) when using
multiple graphics cards.
PCIE1
x16
TM
x16
x16
Mode
X399 Phantom Gaming 6
PCIE2
PCIE3
N/A
N/A
x16
N/A
x16
x16
23