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English
19
X299 Steel Legend
PCIE1
PCIE2
PCIE3
PCIE5
Single Graphics Card
x16
N/A
N/A
N/A
Two Graphics Cards in
CrossFireX
TM
or SLI
TM
Mode
x16
N/A
x16
N/A
Three Graphics Cards in
3-Way CrossFireX
TM
Mode
or 3-Way SLI
TM
Mode
x16
N/A
x16
x8
PCIe Slot Configurations (For CPU with 44 PCIe lanes)
PCIe Slot Configurations (For CPU with 28 PCIe lanes)
PCIE1
PCIE2
PCIE3
PCIE5
Single Graphics Card
x16
N/A
N/A
N/A
Two Graphics Cards in
CrossFireX
TM
or SLI
TM
Mode
x16
N/A
x8
N/A
* 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.
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.
PCIE1
PCIE2
PCIE3
PCIE5
Single Graphics Card
x16
N/A
N/A
N/A
Two Graphics Cards in
CrossFireX
TM
or SLI
TM
Mode
x16
N/A
x16
N/A
Three Graphics Cards in
3-Way CrossFireX
TM
Mode
or 3-Way SLI
TM
Mode
x16
N/A
x16
x8