In my gaming rig I have, FX 8350 Black Edition, ASRock 970M Pro3, GIGABYTE AORUS Radeon RX 580 8GB, 16 Gb Ripjaws DDR3, 1K Watt bronze certified power supply, a 1TB hard drive, and a 125 GB SSD, Now my issue is that when I play games like Overwatch or Grand Theft Auto my game runs fine, until about 5 minutes of gaming has passed, then I still get a constant from rate of 100+ but I have jitters every 10-20 seconds, It's very frustrating, I tried defragging, made sure I had all the right drivers, I've turned V-Sync off, I don't have much running, no viruses. I'm out of ideas. I'm not overheating either. Any help is appreciated!