Not able to get above 4.5 on 6700k

[Smokescreen]

Hi before I could get 4.7 on 6700k the voltage on auto it would go up to 1.4v

I have change case psu and added fans got a h115i. As well updated the bios on my gigabyte z170 gaming 7 motherboard after some research people are saying you should update if your on skylake.

 

Since all this I can't get above 4.5ghz and it needs around 1.39v and my temps are around 83c in cpu z stress test. Cinebench r15 won't work.

 

I read about the cooler not being on properly U check it and pressed it in as hard as I could and checked the thermal paste it got spread out. Had to re apply my own attic silver 5.

 

Stock in cpu z stress test getting 65c.

And I can not change any llc settings just give auto as the option.

 

Any ideas?

 

[Leonard]

Reflash the previous BIOS when you could make the changes.

[Smokescreen]

It's say you can't go back after the update to kaby lake f20.

 

And I don't think matters but I changed corsair power supplys. Can't remember the model. It's fully modular 750w brand new. I tested it in another system before this 1.

[Brooksie359]

11 minutes ago, Smokescreen said:

It's say you can't go back after the update to kaby lake f20.

 

And I don't think matters but I changed corsair power supplys. Can't remember the model. It's fully modular 750w brand new. I tested it in another system before this 1.

yeah if the psu doesn't have as good of voltage regulation it could be causing the board to have a harder time giving clean voltage to the cpu and result in poorer overclocking results. the bios might also be an issue but other than that I can't think of anything else that would cause it.

[Smokescreen]

Also I don't know if there were changes in the bios. But it will not let me above 85c. 

How would I check if it's the psu? 

Also is that just a bad overclocking motherboard? And/or did I get a crap cpu? 

I m see way lower voltages and lower temps on other 6700ks.