ASROCK Fatal1ty X99 Professional Series User Manual page 28

PCIe Slot Configurations (For CPU with 28 PCIe lanes)
Single Graphics Card
Two Graphics Cards in
CrossFireX
Mode
Three Graphics Cards in
3-Way CrossFireX
or 3-Way SLI
*4-Way CrossFireX
For a better thermal environment, please connect a chassis fan to the motherboard's chas-
sis fan connector (CHA_FAN1, CHA_FAN2 or CHA_FAN3) when using multiple graphics
cards.
20
PCIE1
x16
TM TM
or SLI
x16
TM
Mode
x8
TM Mode
TM TM
and 4-Way SLI are not supported for CPU with 28 PCIe lanes.
PCIE2 PCIE3 PCIE4
N/A N/A
N/A N/A
x8 N/A
PCIE5
N/A N/A
x8 N/A
x8 N/A