CPU clock speed always at max (overclocked)

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aznlolboy

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Apr 3, 2015
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System:
i5 4690k paired with a hyper 212 evo
z97 gaming 5
750w Evga g2

So I tried overclocking today and got 4.3hz at 1.2v and temps staying under 70c during prime 95 for about 50min

I was woundering why the clock is stuck at 4.3hz always is there a way to change it so that it downclocks when it isnt in use. The temps also stay at 30-33 idle but the core is still at 4.3hz. and the voltage isnt pulling 1.2v it is just pulsing between .8 to .08.

another thing i noticed is that when running at max the voltage isnt exactly at 1.2, it is at 1.208

The only thing i did to overclock was change ratio to 43, set voltage to 1.2 and change the cpu cores to be Fixed

Update: I set the core voltage mode to adaptive - but does not solve the issue of clocks always running at 4.3
 
Solution
Karadjgne
4.3GHz is the cutoff. Most cpus have enough starting voltage at stock speeds to remain stable up to that point. It's only when going 4.4GHz or better that you need to rethink some things on the OC, like LLC,current capacity, set voltages etc.
I've had my i5-3570k at 4.3 for 4 years now, and it runs 24/7 at 1.08v. Speed step keeps it at 1.6 when idle. What you'll want to do is a little research on the OC of your particular mobo, everybody has a different bios setup, and see what Eco settings are disabled. Eco settings are not compatible with OC

Prime95 is questionable. The last decent version was 26.6 and use small fft for a clean 100% load. Using versions after that results in overly high AVX usage (among others) which drives...
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aznlolboy

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Nevermind I found out Fixed is ment to keep the clock at 4.3 all the time. Swapped it to dynamic and it went down. Is fixed more stable than dynamic? if so is it alright to leave it at 4.3hz all the time since it doesnt pull any more voltage when not in use.
 
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8924th

8924th

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Ideally you'll want to keep it to dynamic, otherwise your CPU will be constantly running at max frequency regardless of load. Besides the power consumption being higher than necessary, you would also be forcing your CPU to stay hotter.

If you want to keep your OC simple, leave everything as is and just play around with your Core Clock. Never set a fixed voltage unless you also plan to run constantly at a fixed frequency as well.

 
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Karadjgne

Karadjgne

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4.3GHz is the cutoff. Most cpus have enough starting voltage at stock speeds to remain stable up to that point. It's only when going 4.4GHz or better that you need to rethink some things on the OC, like LLC,current capacity, set voltages etc.
I've had my i5-3570k at 4.3 for 4 years now, and it runs 24/7 at 1.08v. Speed step keeps it at 1.6 when idle. What you'll want to do is a little research on the OC of your particular mobo, everybody has a different bios setup, and see what Eco settings are disabled. Eco settings are not compatible with OC

Prime95 is questionable. The last decent version was 26.6 and use small fft for a clean 100% load. Using versions after that results in overly high AVX usage (among others) which drives Haswell cpus into fits of extreme and unreliable temps.

Dynamic voltage moves up and down with need, so by nature isn't stable. Fixed voltages alleviate the up/downs. The higher the OC, the tighter the voltages need to be, just for stability, so this is where fixed voltages come into play as more important than dynamic. But you won't be running 4.6GHz or better on a hyper212, so dynamic is fine.
 
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Solution
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aznlolboy

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Yes I use prime 26.6 and after going on battlefield1 for a bit i got bsod on the 4.3hz @ 1.2v - I increased it to 1.21v but cpu-z says it is at 1.216 . My temps seem to be fine never going above 74 on prime , but never going above 70 while in battlefield1 (running at max and rendering at 150 at 1080p - since I own a gtx 1080). is that normal for the voltage to go alittle above what I had set? ( I saw it hit 1.22 sometimes during the prime95 testing)
 
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Karadjgne

Karadjgne

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Yes, perfectly normal. Be nice to see vcore closer to 1.08 or 1.14,look into some of those OC builds specific to your bios, there's usually stuff in the bios you can disable that you have set for auto or enabled that'll help with stability.
 
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aznlolboy

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The only thing I saw others do was disable something called intel C-State, which I think makes the cpu run at 1.2v non stop. would that help? or do i not want the cpu to be at 1.2+ constant.
 
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Karadjgne

Karadjgne

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Intel c-states is a low power mode. State-0 is running full power, state-1 is just went to sleep, state-2 is shutting down unessentials, state-3 is full sleep, etc. In each instance, the cpu sees lower and lower voltages. Ppl who enjoy a decent OC have the cpu set for its lowest stable voltage possible at running speeds, so if that gets lowered, without the cpu backing off on the clock speed setting, the pc gets unstable and bsod. So for those who are doing a full manual OC, of speeds over 4.4GHz, then yes you'll need to disable c-states. If you maintain Intel speed step, that down clocks the pc to 1.6GHz at idle, then c-states really don't mean much. And then there's Haswell cpus and newer. Because of their architecture, they down volt significantly lower than what a older group regulated psu is capable of, you need a DC to DC converter psu, a new digital one basically. So ppl tend to kill c-states of 4 and below, but maintain 3 or higher, enabling the pc to still sleep. Haswell users on a group regulated psu often had complaints of the pc going to sleep, and if that lasted longer than 2 hrs or so, the pc would not wake up. It meant that the pc was in state 4/5/6 and did not have the voltage necessary to wake the pc up.
 
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aznlolboy

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Ok thank you, I guess I will leave it to auto. Since my clock is only at 4.3.
 
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aznlolboy

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Ok, I might just put it on 3 then. probably more stable than auto.
 
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