Stress testing CPU

[Entricks]

Hello everyone,

I just wanted to come in and ask for some knowledge on whether I'm overclocking my CPU correctly. Basically I have my i5 4690k at 4.0Ghz currently on all cores, with a override Vcore voltage of 1.2V, and the same override voltage for my CPU cache setting in my UEFI. I don't want to overclock too much incase of future instability and shortening the life of my CPU, because it's a brand new computer and all.

For stress testing I'm using AIDA64 and I'm currently testing the CPU, FPU and cache. It's been going for about 30 minutes now and it's looking fairly stable with no throttling, at around 52 degrees Celsius. I think that's good because I've seen a lot of people saying theirs reaches around 80c on 100% load? I'll put my hardware specs below.

Also, should I attempt at lowering the voltages on the CPU vcore and cache, and if so, by how much? I was also wondering about putting on adaptive mode after I finish stress testing? I have the adaptive offset values on Auto because I'm not sure what they do so if anyone can clarify that as well I'd be greatly appreciative of what to put those on.

specs are:
i5 4690k @ 4.0Ghz with an NZXT kraken x41 radiator
NZXT phantom 630 case
ASRock fatal1ty z97 killer mobo
8GB kingston hyperx ram
Gigabyte gtx 770 OC
EVGA supernova 750W g2 psu
intel 730 ssd