3-way NVIDIA SLI is enabled from the NVIDIA Control Panel. Right mouse
click on the Windows desktop and select NVIDIA Control Panel. Go to 3D
SettingsΒΌSet SLI configuration (Figure 19) and select Enable SLI technology
(recommended). After selecting this option, you will be prompted to verify the
settings have been successfully configured.
Note: Selecting Do not use SLI Technology sets the configuration into single GPU
mode.