Use Afterburner. EVGA is a tier 1 Nvidia partner and doesn't even make AMD cards. Also Precision X just went through a huge overhaul because of the use of RivaTuner code without permission. I haven't tried the new version yet.
Ive used EVGA Precision X exclusively...and personally dont care for it. Configurations are constantly wonky (max fps settings never seem to save), navigation can just plain ol' fail (e.g., cycling through center options). I'm an EVGA fanboy, died in the wool...but I think Precision sucks.
Use Afterburner. EVGA is a tier 1 Nvidia partner and doesn't even make AMD cards. Also Precision X just went through a huge overhaul because of the use of RivaTuner code without permission. I haven't tried the new version yet.