New GPU Worse Framerates in 2K14

[MJALLDAY]

I recently upgraded my GPU from a Radeon HD 6770 to GTX Geforce 760 superclocked and I am actually getting lower frame rates than I was before. I'm getting like 45 fps with maxed out settings and vram on. There's obviously something wrong. Maybe the drivers? I uninstalled the old AMD drivers through the control panel then I manually deleted the leftovers. Here goes my specs:
CPU Intel I7 2600 @ 3.4 mhz
8 gigs of RAM
PSU: 650 watt cooler master
2 TB HDD

[JaoSming]

did you install nvidia drivers

[MJALLDAY]

Yeah of course. As of this moment this GPU is going back and I'm ready to bid PC gaming farewell in favor of ps4. This whole ordeal has been such a pain in the ass.