Software cannot make your CPU or GPU overheat unless it has inadequate cooling. I promise you.
No game I have ever tested has came close to what Prime or Heaven can do to your CPU and GPU.
Why do you think it's overheating? What are the temps?
I'm an overclocker and I push my systems hard. If they can't run Prime/OCCT steady for hours.. then it isn't a good OC in my book.
Does the 3770k have a stock cooler and your OCing?
Your GTX 660 can go all the way to 97c... you don't want that but it can do it safely. If it's running 70-80c your fine. If you put it in a benchmark like Heaven and it hit 90c or a little above your still good, no game will ever torture it like a benchmark will.
Your 3770k... actually has about the same ranges. If that's overheating at 4ghz, I would highly suggest starting from scratch because your voltages are wrong for 4ghz, that's fairly mild I believe for that chip.
I'm no fan of nVidia or AMD's stock fan profiles. I use Afterburner and I make them ramp up way faster.
I have two of nearly the hottest cards on the planet and I OC the snot out of them and still get better temps than what the default fan profile would do at stock clocks on a benchmark. Yes it sounds like a jet engine lol
I always have an auxiliary monitor with graphs of GPU/ CPU usages and their temps.
** With the second poster now I'm curious... I'm going to go play a round or two and watch my temps like a hawk.
