It doesn't. Even with prime95, i get around 80-85c. But i know that's not a realistic test. In gaming, i don't go over 67-68c, no matter what i play.
It's just idle, it stays at 42c, 7-8 seconds later, jumps to 52, then slowly comes back down, and keeps doing that forever.
I'll get an aftermarket cooler anyway. And i'm gonna change the mobo, that'll help with temps as well.