So i just got a second 670 at a super cheap price. Everything is connected and set up correctly. I turned on my computer and it recognized the second gpu and started downloading the drivers immediately. The problem is i don't actually know how to "activate" SLI. Everything recognizes the second gpu. If turn on msi kombuster is shows me the temp and load for the gpu #2. In Geforce Expirience if i go under my rig it has 2 670's listed. I know i'm suppose to go to the nvidia control panel but i dont have the sli option. Under 3d settings in the nvidia control panel it should have "Configure surround,PhysX, and sli" but i only get that option without it saying sli? Any idea or other ways to set up sli? Is the sli bridge not connected properly?