6700k overclocking question

[Nicoh0712]

I managed to oc my 6700k to 4.5ghz on 1.150v
Stable on aida64 and prime95
My cpu cooler is the cm hyper 212x

I tried to up my frequency to 4.8 ghz using 1.390v
I dont wanna go past 1.4v
My question is do i have a good cpu because i managed to oc it to 4.5 with only 1.150v?
If i get another cpu cooler maybe a nzxt x61
Will my cpu manage to get the 4.8 or maybe 4.9 ghz under 1.4v?

Thanks.

 

[Nicoh0712]

It crashes when i set it to 4.8ghz 1.390v

 

[TechyInAZ]

That's the silicon lottery for ya. That's how CPUs work, you might be able to pull crazy low vcore at a certain frequency, but that does not guarantee you can do the same for higher frequencies.

For example, I can pull 1.250v at 4.5ghz (4690K), but I can't even run 4.8ghz without going past 1.4v.