Asus P9X79-E WS - Manual (Page 175)

ASUS P9X79-E WS 5-13
B1. If you cannot see the NVIDIA Control Panel item in step
(A), select Screen Resolution.
B2. From the Screen Resolution window,
click Advanced settings.
5.2.5 Enabling the NVIDIA ® SLI™ technology
After installing your graphics cards and the device drivers, enable the SLI feature in NVIDIA®
Control Panel under the Windows® 7 operating system.
Launching the NVIDIA Control Panel
You can launch the NVIDIA Control Panel by the following two methods.
A. Right click on the empty space of the Windows
® desktop and select NVIDIA Control
Panel.
The NVIDIA Control Panel window appears (See Step
B3).