I just put together my first computer. My case is on the way back to me because it was damaged and I had to RMA. Meanwhile, I decided to put my parts together and test it out. Everything went together fine, but when I run intel burn test or Prime95, the core temps rise from about 28C to 70C-80C in seconds. I tried reinstalling the heatsink and everything and am getting similar results. I'm not sure what is wrong.
Actually, while not as bad, I am still having the same problem. My temps instantly shoot to 68C-77C from idle temps when I run prime95. I guess it was actually running at 3.95GHz, does this sound right or ismy heatsink/thermal grease not properly installed again?
Use Aida 64 for testing the Ivy Bridge. Prime can actually damage the Ivy, don't use it, it's not optimized for Ivy's architecture. Then see what your reading are using Aida 64. If it is still hot then you have a problem, but don't be surprised to see it running a little warm. It does shoot up rather fast, but I'm running mine under water, and at 4.4 Ghz I haven't even seen 80 during a stress test.