ASROCK X299 Taichi CLX Handbuch Seite 24

PCIe Slot Configurations (For CPU with 44 PCIe lanes)
Single Graphics Card
Two Graphics Cards in
CrossFireX
Mode
Three Graphics Cards in
3-Way CrossFireX
or 3-Way SLI
If a M.2 PCI Express module is installed on M2_1, PCIE2 will be disabled.
PCIe Slot Configurations (For CPU with 28 PCIe lanes)
Single Graphics Card
Two Graphics Cards in
CrossFireX
Mode
If a M.2 PCI Express module is installed on M2_1, PCIE2 will be disabled.
For a better thermal environment, please connect a chassis fan to the motherboard's
chassis fan connector (CHA_FAN1/WP, CHA_FAN2/WP, CHA_FAN3/WP, CHA_FAN4/
WP or CHA_FAN5/WP) 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 TM
x16
TM Mode
x16
TM
Mode
PCIE1
x16
TM TM
or SLI
x16
PCIE2 PCIE3 PCIE4
N/A N/A
N/A x16
N/A x16
PCIE2 PCIE3 PCIE4
N/A N/A
N/A x8
PCIE5
N/A N/A
N/A N/A
N/A x8
PCIE5
N/A N/A
N/A N/A