Ghz cap at 4.2 ghz when oc'd to 4.8

NickyCWario · Jan 23, 2017

I have an i5 7600k and an asus z170-p and when I try setting the core ratio in the bios to 48, it boots and works fine but when I check CPU-Z it only shows it going to 4.2ghz under 100% load despite the multiplier being x8-x48?
Is this normal or some sort of failsafe for the cpu, or am I missing something.

Thanks in advance

burnhamjs · Jan 24, 2017

NickyCWario :

what are your temps? perhaps thermal throttling. If your temps are getting high you may need to drop vcore.

NickyCWario · Jan 24, 2017

burnhamjs :

My temps got to around 70 degrees celsius and I'm not too sure about the vcore or how to change with that properly but I get how it works, I think it could only have been 1.2-1.3 at most.

burnhamjs · Jan 24, 2017

NickyCWario :

burnhamjs :

My temps got to around 70 degrees celsius and I'm not too sure about the vcore or how to change with that properly but I get how it works, I think it could only have been 1.2-1.3 at most.

those temps are fine (as long as it stays below 85C, though i prefer to keep them below 80 during stress testing). Vcore looks fine as well. I like to keep my vcore below 1.35V.

NickyCWario · Jan 24, 2017

burnhamjs :

NickyCWario :

those temps are fine (as long as it stays below 85C, though i prefer to keep them below 80 during stress testing). Vcore looks fine as well. I like to keep my vcore below 1.35V.

So is this just an odd occurrence then and is there a way to more or less force it to go to the higher clock, I have turbo mode on which gets it to 4.2 but without means it only gets to 4.0.

sizzling · Jan 24, 2017

I am not an OC expert, very much a novice but I think you may need to raise the maximum power the CPU is allowed to take. I remember a similar problem when OC'ing my 4670k and I had to up the max wattage the CPU was allowed to use.

burnhamjs · Jan 24, 2017

NickyCWario :

Are you trying to overclock by adjusting your turbo ratio or a regular overclock?

I have turbo, speedstep, and c-states disabled when I overclock. Then I set Vcore to 1.35V (and enable enough LLC such that when i monitor Vcore in CPU-Z I don't see any significant drop or boost between idle and stress testing). Then I increase my multiplier one step at a time - run a stress test and see if it passes and temperature remains below 80C. If it passes then I up my multiplier and run again. If the stress test fails then I know I have raised my multiplier too high. If the temps are greater then 80C then I know I have too much Vcore. This is it in a nutshell.

If you have turbo disabled - are you saying you can't set a multiplier 44? (as an example) with a corresponding frequency in CPU-Z of 4.4G

NickyCWario · Jan 24, 2017

Are you trying to overclock by adjusting your turbo ratio or a regular overclock?

I have turbo, speedstep, and c-states disabled when I overclock. Then I set Vcore to 1.35V (and enable enough LLC such that when i monitor Vcore in CPU-Z I don't see any significant drop or boost between idle and stress testing). Then I increase my multiplier one step at a time - run a stress test and see if it passes and temperature remains below 80C. If it passes then I up my multiplier and run again. If the stress test fails then I know I have raised my multiplier too high. If the temps are greater then 80C then I know I have too much Vcore. This is it in a nutshell.

If you have turbo disabled - are you saying you can't set a multiplier 44? (as an example) with a corresponding frequency in CPU-Z of 4.4G

I have turbo enabled most of the time but I'll try it your way since you sound like you at least know where to start with this kind of thing, and I'm doing it by changing the 'cpu core ratio' in my bios.

I have an Asus z170-p with 3017 v. if that helps

Update: No difference, bios clock still doesn't correlate to the cpu-z clock.

NickyCWario · Jan 24, 2017

sizzling :

I had a look into that too but there isn't an option for it anywhere I can find

alphadogg123 · Jan 25, 2017

Try running cpu-z benchmark on the bench tab. You can use this test to calculate the difference between the results at 4.8ghz and stock speeds.
It seems that cpu-z is reporting incorrect numbers on new configs.

NickyCWario · Jan 25, 2017

alphadogg123 :

Yeah I tested that and all the scores no matter what the cpu core ratio in the bios is set to stay borderline exactly the same with scores ranging from about 1932-1936 in the single core score and if I remember correct about 7930-7950 in multi core score.
I can only assume it's due to the motherboard's bios as it classes it as a 'beta build'

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