ASROCK X299 User Manual page 29

PCIe Slot Configurations (For CPU with 28 PCIe lanes)
Single Graphics Card
Two Graphics Cards in
TM
CrossFireX or SLI
Mode
Three Graphics Cards in
3-Way CrossFireX TM
TM
or 3-Way SLI Mode
Four Graphics Cards in
TM
4-Way CrossFireX
PCIe Slot Configurations (For CPU with 16 PCIe lanes)
Single Graphics Card
Two Graphics Cards in
TM
CrossFireX or SLI
Mode
Three Graphics Cards in
TM
3-Way CrossFireX
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.
PCIE1
x16
TM
x16
Mode
x8
x8
Mode
PCIE1
x16
TM
x8
x8
Mode
PCIE3 PCIE4
N/A N/A
N/A N/A
x8 N/A
x8 N/A
PCIE3 PCIE4
N/A N/A
N/A N/A
N/A N/A
X299 OC Formula
PCIE5 PCIE7
N/A N/A
x8 N/A
x8 N/A
x8 x4
PCIE5 PCIE7
N/A N/A
x8 N/A
x8 x4
23