I have my i5-760 overclocked to 4.01 Ghz and when running prime95 my CPU temps are averaging around the 80C (air cooled). I want to push my CPU farther because I want to be able to reduce the bottleneck for the GPU, if I decide to upgrade to the GTX 970. I don't know when enough is enough...
[EDIT] I just noticed that my CPU is throttling when it hits around 85C causing the clock speed to drop to 1.8 Ghz.... O dear