When running some of the newer games, like GTA V and Assassin's Creed Unity, My GPU usage is nearly always at the 95% usage mark but the temperature never goes above 60 degrees celsius. My question is, should i be worried about my GPU dying?
I'm actually surprised you can run AC Unity with a GTX 660. It would go to 100% in any newer game most likely as it's the weak point in your system. And i7baby is correct about the temps.