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Do The Stability Of Clock-Speed Of Cores In A CPU Depend On CPU Temperature

Do The Stability Of Clock-Speed Of Cores In A CPU Depend On CPU Temperature

  • YES

    Votes: 35 94.6%

  • NO

    Votes: 2 5.4%
  • Total voters
    37
Aquinus said:
That's where a higher ΔT between the the heat carrier (liquid and block,) and the heat producer (the CPU,) comes into play. Conduction of heat can never exceed the difference in temperature between the source and the "sink".

@Kai Vegeta: You can never cool something below ambient temperature because heat conduction requires a temperature differential. With that many radiators, you could have a phase change system when an evaporator before the CPU in the liquid loop and a condenser after the first radiator. This has the benefit of cooling the liquid going into the CPU potentially below ambient temperature while using the subsequent radiators to disperse the re-heated air from the phase change loop. Of course, depending on the strength of such a system, you may need to make some form of anti-freeze for your loop and you'll want to cover up anywhere susceptible to condensation or frost but, only a solution like that could possibly offer a long term solution to higher overclocks because it's going to take a lot more than above ambient temperatures to make a serious dent in your overclocking ceiling. You'll need 10*C or lower under load (in my opinion,) for it to truly make a difference. Also keep in mind that this makes your computer depend on a phase change system in order to keep it cold enough to operate properly so, it's a really a lot of work for what I would consider minimal gain.

I don't intend to be mean when I say this but, your idea feels like it's coming from someone with more money than brains. You can't simply throw more of something (like radiators,) at a problem and expect it to be better. You need to simplify to make it more feasible and realistic. While you can do what you're suggesting, it won't get you much further and is simply a waste when there are better ways to spend that money on hardware.
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Wow that is a great solution for long and extensive over-clocking the two problems that I would face are that if CPU is not properly covered and water goes into CPU then it will be a problem, but that will be my mistake and I can buy new one. Main problem is sound can I reduce it to a large extent by using noise-reduction padding around it or to the walls of the case, will it work or is it waste to try reducing the noise level?
 
Kai Vegeta said:
Wow that is a great solution for long and extensive over-clocking the two problems that I would face are that if CPU is not properly covered and water goes into CPU then it will be a problem, but that will be my mistake and I can buy new one. Main problem is sound can I reduce it to a large extent by using noise-reduction padding around it or to the walls of the case, will it work or is it waste to try reducing the noise level?
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Try using noise reduction material it should decrease noise to some extent
 
So it is you Sir.....
Sir please can you help me in my build I live in Hyderabad and want to do a big build please can you help me sir. :)
 
I am not that old that you call me 'Sir' and don't discuss out of topic matter in the thread if you want to discuss out of thread matter start a personal conversation.
 
Kai Vegeta said:
If the answer is yes, please can you clarify me that do CPUs have specific point beyond which if we OC the CPU the clock-speed of cores will loose stability even if temperature is in control??

If the answer is no, then what should we do to get stability while achieving higher clock speeds??
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many factors but the answer is YES, experience, conditions, hardware, silicone lottery all play a role to the point when a CPU losses its stability even though it may clock out higher. Sense going higher requires more voltage temps always lead the way.
 
in theory to make the chip go faster more volts are required.. beyond a certain point even a small speed increase requires a lot more voltage..

this will generate too much heat for the cooling system to cope with.. a modern chip will simply throttle down or switch off..

but simply adding more radiators and fans will not solve the problem.. other methods of cooling are required..

a google search along the lines of "extreme cpu cooling" should provide some results..

trog
 
It is a real thing. As heat increases so does power consumption as well (look at the older Fermi GPU's if you don't believe me). As power consumption increases, heat increases and stability will inevitably decrease. If it didn't matter people wouldn't overclock on LN2, LHe and DICE.
 
cdawall said:
It is a real thing. As heat increases so does power consumption as well (look at the older Fermi GPU's if you don't believe me). As power consumption increases, heat increases and stability will inevitably decrease. If it didn't matter people wouldn't overclock on LN2, LHe and DICE.
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If let's say power input is high but still I manage to get low temperature will I get stable overclocking
 
Kai Vegeta said:
If let's say power input is high but still I manage to get low temperature will I get stable overclocking
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There is no way for me to say. There are a million variables. Overclocking is trail and error, overclock your rig watch your temps and work the stability out.
 
Will I damage my CPU if I throw in high voltage even while maintaining low and stable temperature
cdawall said:
There is no way for me to say. There are a million variables. Overclocking is trail and error, overclock your rig watch your temps and work the stability out.
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Depends what cpu and what you consider high voltage but yes it can
 
Vineet Reddy said:
i7 5960x to 160-170w I am running it on 5.3ghz but want to push it further I am having watercooling with cold air input
Click to expand...

Add more voltage and move on.
 
Kai Vegeta said:
If the answer is yes, please can you clarify me that do CPUs have specific point beyond which if we OC the CPU the clock-speed of cores will loose stability even if temperature is in control??

If the answer is no, then what should we do to get stability while achieving higher clock speeds??
Click to expand...

Stability is not only determined by temperature but also by the method you use to overclock in the first place.

Of course high temperatures can and do affect high overclock stability, and temperature can be a limiting factor as to how far you even get with your overclocking.

But you can have a high temperature and still remain stable, but that does not mean your CPU is not already internally throttling to protect itself from that type of idiotic overclocking.

That type of internal throttling is evident in the CPUs output performance, so in one post, Joe Bob brags about his so called high stable overclock,
in another post Joe Bob is completely baffled as to why his overclocked benchmark score is way lower than his stock score was?

Joe Bob comes to the conclusion that overclocking is bad, because Joe Bob is completely ignorant of the fact that his CPU has built in protection that he cannot do a thing about!

Your CPU has built in protection to protect itself against, automatic motherboard settings that may go outside of the CPUs design specifications, or the individuals overclocking.

How do you think they warranty most CPUs for 3 years, if they did not build in internal protection, it's kinda like a throttle governor on a school bus, but much more complicated.

Sometimes it literally amazes me the amount of overclockers that are completely clueless as to the actual design specifications of what they are overclocking.

This applies to Intel and AMD CPUs, both camps have built in protection, Intel is pretty much open in their information disclosure, where AMD is a little harder to acquire the information.

The overclocker is left with the options of either overclocking to a state of stability with zero CPU performance degradation that is allowed by the CPU cooling he or she is running, or get better cooling and go a little further.

I cannot speak for you but I do not want my CPU overclocked to yield worse performance than it did stock, if that's the case, why overclock at all?

FYI, My 3770K Ivy bridge CPU has been overclocked to 5ghz for over 2 years, with zero benchmark performance loss.

There is much more to your initial questions than you may realize, and in some ways they affect each other because it is not just a simple Yes or No.

How the overclock is achieved is very critical, and IMO, manual BIOS overclocking is the best way to accomplish it, but you have to learn how to do it.

Edit: Sometimes your overclock is directly affected by the memory speed you are running so it's best to know what your CPUs memory controller was actually designed to run and understand the higher the CPU overclock the more heat is produced from an overclocked memory controller.
 
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trog100 said:
the temps and stability are not directly related..

the chip can be super cool and still unstable or "hot" and still stable.. everything else being equal the chip wont be any more stable at 60 C than it is at 80 C..
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That is false... sorry. I have run into plenty of issues overclocking and losing stability but lower the temp helps it out. This is typically towards the top/limit of its range and why most, at least at OCF, not sure about here as this place is more, well, not as into overclocking, mention to keep the CPU under 90C (Skylake).

When you get into subambient overclocking, or even put your rig in the garage in the winter to benchmark, you can be stable where you werent before with significantly lower temperatures as well. You can overclock higher with the same voltage the colder you are. You can also use more voltage the colder you are and have less risk of damaging the processor. Read post #15. :)

As far as that cooling loop..........LOL... wow. What good are all those radiators when your blocks can only output so much heat? You are well, WELL, past the point of diminishing returns there...
 
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EarthDog said:
When you get into subambient overclocking, or even put your rig in the garage in the winter to benchmark, you can be stable where you werent before with significantly lower temperatures as well. You can overclock higher with the same voltage the colder you are. You can also use more voltage the colder you are and have less risk of damaging the processor.
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Affirmative!
 
Err there are many factors to stable OC such as heat, RAM (& timing), MB, voltage (which relates to heat...), power supply quality (correlates to voltage), the chip quality itself, or even BIOS might be a factor. They all directly related to stability of OC...
 
yes as temperature goes up stability at a given frequency and voltage goes down the hotter things get the the slower they operate the the more voltage they require
 
EarthDog said:
Id like to see that and just how stable the CPU actually is there.................

The sample we reviewed upon release was well above average and we were at 4.8Ghz at 1.4V...
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He is running cold water, with no mention of vcore
 
Kai Vegeta said:
Thank you very much for spending your time on this. :)

I will be using 12 rads 4 x 4fan 140mm only for CPU and 8 which will be divided as 2 x 2fan 140mm for each GPU and will be doing 4-way SLI. All the rads will have push-pull configuration. And will we setting up 16 fans for good air intake which will be cold nearly at 15C. I will also be providing separate reservoir-pump for CPU and GPU. So with configuration can I do high overclocking.
CPU_LOOP.jpg

GPU_LOOP.jpg
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Try to understand whether air or water cooling, you are still ambient cooling, so even if you can accomplish a 0 DeltaT with all those radiators you will only reach so far overclocking!

My 3770K is overclocked to 5ghz but that is with below ambient Chilled Water Cooling, traditional radiator cooling even with a 0 DeltaT will not support the 5ghz overclock.

With the amount of money it would take for all the rads in the sketch, you could duplicate my cooling cheaper.
 
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