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 H70w/Delta 240CFM Fan: 16GB Corsair Vengeance DDR-3 1600: 2 XFX Radeon 7950 @ 1150/1575 : Corsair AX 860 PSU: x2 WD Black 1TB HDD's: 90GB OCZ Agility 3:CL X-FI:Corsair 500R Arctic White Edition:3 22inch Asus monitors Eyefinity @ 5294x 1050(bezel comp) : Alienware Tact-X Keyboard: Naga Razer gaming mouse:Corsair Vengance 1500 Headset .