ASROCK X299 GAMING i9 User Manual page 30

PCIe Slot Configurations (For CPU with 28 PCIe lanes)
Single Graphics Card
Two Graphics Cards in
TM
CrossFireX
Mode
Three Graphics Cards in
3-Way CrossFireX
or 3-Way SLI
PCIe Slot Configurations (For CPU with 16 PCIe lanes)
Single Graphics Card
Two Graphics Cards in
CrossFireX TM
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.
* If you install CPU with 44 or 28 lanes and encounter CrossFire issues, please
do the followings.
1. Enter UEFI by pressing <F2> or <Del> during system startup.
2. Select "Boot > CSM" from the menu.
3. Set "Launch Storage OpROM policy" to "UEFI only".
4. Press F10 to Save and Exit.
22
PCIE1
x16
TM
or SLI x16
TM
Mode x8
TM Mode
PCIE1
x16
x8
Mode
PCIE2 PCIE3 PCIE4
N/A N/A
N/A x8
N/A x8
PCIE2 PCIE3
N/A N/A
N/A x4
PCIE5 M2_1
N/A N/A
N/A N/A
N/A x8
PCIE4 PCIE5
N/A N/A
N/A N/A
x4
x4
x4
M2_1
x0
x4