Recently I upgraded my GTX 660 to an r9 290 but the drivers are really unstable. Before installing the new card in my rig, I uninstalled the NVIDIA drivers from my PC. After that, I installed the latest AMD drivers (14.4), After about 30 minutes of playing Skyrim, the display drivers stopped responding and my FPS dropped from 60 to 20-40 because my memory clock dropped from 5000mhz to 150mhz and I don't know why that happend. It seems that everytime the drivers crash whilst the card is under load, the memory clock gets stuck at 150mhz. I have tried all the older drivers upto 13.11 and the problem still persists. This never happend with my old GTX 660 so it is not a problem with any other pieces of my hardware in my rig. Could someone help me resolve this problem?
Thanks