I've recently just changed the tubing on my Alphacool Eisbaer 360 AIO, On removing of the cooler I discovered I didn't have a good contact on the CPU as thermal paste was only covering just over half of the cold plate even though I had totally covered the CPU with paste before putting on the CPU block, I thought I had a bad CPU has I was only getting 4.1ghz and any further my PC would just shut down, but now I've sorted thing out I'm now getting 4.2ghz @ 1.3850v and temps after one hour stress testing 67c, Can this CPU go higher? And what's the limits on the voltages that I shouldn't pass?