Thanks for your advise, man. But running fun 100% would be noisy as hell.
I only have one fan, the case is damn small from shuttle, I swear I will not buy small factor form anymore.
Everything is the case is hot, the CPU is the coolest thing in there. The GPU is around 60C, hard drive is about 55C, they all stuck in there. I guess the ambient temp inside the case is high, that's why the CPU can't be cool!
Well, I decide not to care about it anymore. It has never given me any problem anyway. Let me make my life easier by worring one less thing...
Thanks to all of you guys who replied to me.
Peace.