So I'm having issues with the latest versions of the amd drivers (since august 2015). After i start CS:GO the framerate is normal for about 2 minutes. If i join on a server (or actually just load a map) the fps start decreasing form about 120 fps (on almost any graphics settings??) to about 60 fps after ~10 minutes. They wont go much lower, but when i return to the menu they wont increase either. I can resolve the issue by restarting my game, but after some minutes (on one map) the problem starts all over again. It only happens on the drivers since august 2015. Crimson Software did not change the problem at all, so I'm still sitting here with drivers from march 2015 and hoping that anyone could help me out.
OS: Windows 7
CPU: Intel i7 3610QM
GPU: AMD Radeon HD 7970M
RAM: 8 GB
Hard drives: 2x 250GB SSD, 1x external 1TB Hard drive
The laptop is a Schneker P502 Pro