I recently installed an i5-4690K with an H80i (that I got for a fabulously low price), and I have a question concerning the core temps. Under prime95 testing w/small FFT's, cores 0, 1, and 2 run at around 64-65C. Core 3, however, runs at 59C. I'm not too tech savvy, so I'm not sure if this temperature disparity is normal, or if it's something I should check out (perhaps reposition the heatsink, reapply a more "even" layer of TIM, etc.)
I have a mildly OC'd the i5 to 4.0Ghz.
Edit: Also, at Idle, the difference in temperatures is smaller, with cores 0, 1, and 2 idling around 32, and core 3 idling around 30.
Thanks a lot Neowin!