FPS slowly decreasing every boot

[Epsichron]

Hey, so a month ago or so I bought a new graphics card, (GTX 770) and it's been pretty good to me. 

However, until recently, everytime I boot a game the FPS gets worse and worse.

I've never had this issue until recently, even though I haven't changed anything.

For example, on minecraft, on mostly max graphics, I got 100-150 fps, but now struggle to get over 30. Even on lowest settings.

 

A friend said it might have something to do with the graphics card, so I'm posting it here. (sorry if it's in the wrong area, this is the first time ever posting on a forum)

 

My cpu is horrible, but has been fine, as said, until recently.

Any way I could possibly try to get my FPS back? after going from a constant 60+, going back to 20-30 is unbearable. 

Thanks!

[Epsichron]

My CPU is an i3 530 (yes, I'm aware that it causes horrible bottleneck, but i've never had an issue)

and alright, i'll try! thanks

[Enderman]

Use DDU to unisntall drivers and reinstall.