I hope you learned your lesson. Don't let steam install your drivers. Do it yourself through AMD's driver download section. Or your manufacturers driver support download page. (Steams driver installer is less then steller and often messes up things its not even supposed to be releated to. No idea why they released it. Its trash)
So uninstall the drivers. Then install the ones that were working for you before.
I5 3570K@4~5.0ghz: Gigabyte GA-Z77X-UD3H:Corsair Hydro H110 :16GB Corsair Vengeance DDR-3 1600: x2 XFX Radeon 7950 @ 1100/1575 : Corsair AX 860 PSU: x1 WD Black 1TB HDD's: 90GB Agility 3: 960GB SSD : Creative Labs X-FI:Corsair 500R Arctic White Edition:3 22inch Monitors Eyefinity @ 5294x 1050 : Alienware Tact-X Keyboard: Razer Naga :Corsair Vengence 1500 Headset: Corsair SP2500 Speakers