So for the past two days, my CPU has been going crazy on me. Yesterday, I started hitting 100ºC instantly on Prime95 26.6 100% load torture test. I originally thought that the issue was something to do with the cooling setup, so I remounted the heatsink with AS5, which didn't work. Eventually, I found out the issue was that I had in BIOS changed the power options to ASUS ROG optimized mode or something, which automatically upped the Vcore by a little bit. After I changed it back to normal settings, I got 80ºC after only 2 minutes of torture testing, which is slightly better, but I used to get 70ºC after 2 minutes. Ambient temps hover around 28ºC, and I get idle temps at around 32ºC, which is fine. I'm concerned about max load temps. At 40% load, I'm not even hitting 40ºC. In addition, it now boots at 4.0GHz and then slows down and levels off at 800MHz even a dead idle, instead of ~100MHz and I can't seem to change it back, even after loading optimized defaults in BIOS. I have a Corsair H55 push/pull, i7 4790k, and a VII Hero mobo. Can someone please explain what is going on, and how I can get my CPU to work normally again? It was working fine a few days ago, and I believe it might have to do with voltage and CPU speed, instead of cooling. I tried clearing the CMOS and changing the power saving options, but none of these worked. Any reply would be much appreciated. Thanks.