*HELP!* GPU Plugged in but Games are Choppy!

[BarackObarlow]

Hi there, So everything was running fine and smooth on my graphics card yesterday. I installed a new CPU Cooler (Corsair H60) and put everything back into the case as was before. However this time I noticed that games were very choppy. So I unplugged the card, put it back on the motherboard and made sure all the connections were fine. Everything seemed great but games were now slightly choppy (No where near as bad as before).

I've made sure everything is plugged in okay and everything else I do on the PC is fine, I've had no error messages and youtube and other applications run fine.

I'm wondering if it's dust or anything but I'm worried when I was taking the card out that i've knocked it or something and damaged it but I would have thought it wouldn't run as smoothly as it is if it was damaged? I'm not sure.

Would be great if someone could help shed some light on this. Thanks.

 

[BarackObarlow]

GTX 760, Intel i5 4670k, 8GB Ram, COD Ghosts, Tomb Raider, GTA IV, Anything really. It's not the specs as everything was running great the other day it's just when I took everything out and put it all back together.

 

[BarackObarlow]

Okay I downloaded Core Temp and yes it seems that it wasn't fitted correctly, core temps running at 74 degrees on each core ****

 

[BarackObarlow]

I just uninstalled the H60 and put in the stock cooler, are temps running at between 34-45C normal?