Im not really sure how to enable SLI on my computer. Im using two monitors btw and I have a 1200watt corsair PSU with a sabertooth z77. Also im using a 3770k underwater as well as my graphics cards. I went into the nvidia control panel and the only way I was able to get it to say that it was in SLI is if I turned on 3D but then my screen would start to glitch and the colors would be all weird. How do I fix it?