So recently my Gigabyte OC Windforce AMD Radeon HD 7970 3GB version has been getting lower FPS and stutters sometimes while playing games. Usually the FPS in GTA V was about 90 - 100 FPS , but recently i got 40- 60 FPS and some stuttering. Drivers are up to date dont know what is the problem. Any suggestions? I am running with 8 GB of RAM and AMD FX 8320.