Getting Low or variable FPS on games Please Help

LeHerpDeeDerp

Honorable
Jan 9, 2014
13
0
10,510
I've had this problem of getting low fps before, but it was solved by replacing an old HDD that had a virus that greatly raised my CPU usage and couldn't be removed with any program. I first learned I had the original HDD problem because I plugged in my friends HDD into my system and it worked great, so I know my system can handle the games. After I replaced it I was getting much better FPS and CPU usage such as 90 FPS on BF4 with only 70% CPU usage, but now it's slowly getting worse. On BF4 it's anywhere from 30-80; Minecraft is 15-100 and anything else I play is basically the same variability. I've updated all my drivers, optimized my games and specs, but it's not working. I also have a friend who has a 3 year old AMD card, and he claims he gets a constant 100fps on MC while mine fluctuates. Does anybody have a clue on how to fix it? Because I don't want to know that I have another hidden virus, and I've been to Tiger Direct and they basically told me to screw off because I didn't have the Windows sticker on my rig, and I don't trust BestBuy with anything.

Specs:
Windows 8.1
CPU: i5-3570K
Graphics: GTX 760SC
Motherboard: ASUS P8Z77-V LX LGA 1155 Intel Z77
HDD: 1TB WD 7200rpm
PSU: Corsair CX750 Builder Series
RAM: 8GB Corsair
CPU Fan: Stock Intel fan (I also have a Cooler Master Hyper 212EVO to switch if needed, but it just barely fits in my case)
 

IRyannHD

Distinguished
Delete your GPU drivers manually from the control panel>uninstall a program and delete everything nvidia, but I recommend a sweeper like Guru3D and then reinstall the GPU drivers from the website not experience etc.