Graphics Card Problem

I recently bought a Nvidia GTX 660Ti to replace my older 560Ti. However, the card is having some major issues. The moment I had it installed and launched a game, I was getting noticeable lines running down the screen every time I looked at a black area or cut-scene, and the card would make a high pitched squeal-like noise. I then decided to download driver cleaner to completely get rid of previous ATi and Nvidia driver that may have been present on my PC. This stopped the high-pitched squeal and lines in some games but they are still present in others. I then tried to turn on adaptive v-sync as suggested by another forum but to no success, the lines and squealing are still there on some games. Can anyone help me?

PC Specs:
Intel i7 2600k 3.2ghz
8GB RAM
Corsair GS 700W PSU
Windows 7