Hey, all I can say is I have a GTX 680 and I almost never crash and my settings are maxed, with a resolution of 2560x1600. You can't really crank it harder than that.
Some computers really just don't have a problem. For all I know, I'm the exception to the rule, though from what I've read, other people have found luck in doing one thing or another that stops their game from crashing.