Massive frame rate drops after ~30 minutes, FPS drops from 75 to <30

IzakL

Commendable
Aug 19, 2016
4
0
1,510
CPU: AMD FX-6300 Six-Core

GPU: AMD Radeon R9 380

Motherboard: GA-78LMT-USB3

RAM: 8 GB

OS: Windows 10, 64-bit


My PC is 7 months old. I used to be able to run games like Rainbow Six Siege and Elite Dangerous at 60-75 FPS, (75 FPS being the limit of my monitor's refresh rate) on maximum graphics settings with no issues. Lately, I've been having issues where suddenly after about 30 minutes of play in said games, my FPS drops to <30. It is also worth noting that when my frame rate was stable, it was still lower than usual.

I am fairly certain the problem is with either the CPU, Motherboard/BIOS, or cooling system. Any help is much appreciated.
 

IzakL

Commendable
Aug 19, 2016
4
0
1,510
http://i.imgur.com/uUXrLgw.png Here are the temps during an FPS drop. Is anything particularly high?

 

IzakL

Commendable
Aug 19, 2016
4
0
1,510

I don't another PSU to try. Do you have any other suggestions? One thing I noticed that might help is that after I restart my PC, games will run at a normal frame rate again, but not for long.
 

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