After my brother purchasing new laptop I got his old pc.While uninstalling several programs that I knew I wouldn't use I accidently uninstalled my graphic card drivers. My display screen went nuts and my settings went to windows xp alike for some reason after that(using Windows 7 btw). After I downloaded drivers from official website everything went back to normal except one thing, every single game got it's frame rate reduced by at least 30 fps, even undemanding games like Hearthstone. I remember my brother playing Far Cry 3 on medium settings with 50-60 fps and I can't play anything, not even on low settings. Please I need help, my graphic card is AMD Radeon HD 5500 Series.