ASRock X99 OC Formula/3.1 User Manual - Page 26
Single Graphics Card, Two Graphics Cards in, CrossFireX, or SLI, Hree Graphics Cards in, Way
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PCIe Slot Conigurations (For CPU with 28 PCIe lanes) Single Graphics Card PCIE1 x16 PCIE2 N/A PCIE3 N/A PCIE4 N/A PCIE5 N/A Two Graphics Cards in CrossFireXTM or SLITM Mode x16 N/A N/A x8 N/A hree Graphics Cards in 3-Way CrossFireXTM Mode x8 or 3-Way SLITM Mode x8 N/A x8 N/A *4-Way CrossFireXTM and 4-Way SLITM are not supported for CPU with 28 PCIe lanes. 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. English 20
20
English
PCIe Slot Con±gurations (For CPU with 28 PCIe lanes)
³or a better thermal environment, please connect a chassis fan to the motherboard’s chas-
sis fan connector (C´A_³AN1, C´A_³AN2 or C´A_³AN3) when using multiple graphics
cards.
PCIE1
PCIE2
PCIE3
PCIE4
PCIE5
Single Graphics Card
x16
N/A
N/A
N/A
N/A
Two Graphics Cards in
CrossFireX
TM
or SLI
TM
Mode
x16
N/A
N/A
x8
N/A
Hree Graphics Cards in
3-Way CrossFireX
TM
Mode
or 3-Way SLI
TM
Mode
x8
x8
N/A
x8
N/A
*4-Way CrossFireX
TM
and 4-Way SLI
TM
are not supported for CPU with 28 PCIe lanes.