Most of my games don't have this problem. But my favorite game 'Unturned' seems to loose frames the longer I play it. I even tried speeding up the fan and keeping it below 50 degree's but it still lost some frames. I thought it was the temperature so I was going to buy a case but I don't know if that's the issue.
Specs -
GPU: GTX 950
AMD A8-6500 APU with Radeon(tm) HD Graphics
8.00 GB RAM
1920 x 1080, 60Hz
Driver Version 372.70
Specs -
GPU: GTX 950
AMD A8-6500 APU with Radeon(tm) HD Graphics
8.00 GB RAM
1920 x 1080, 60Hz
Driver Version 372.70