CPU Clock Speeds

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InfernoxCJC

InfernoxCJC

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Sep 21, 2014
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Hey Toms,
Hopefully just a quick one.

Are there any negative effect (assuming the system is 100% stable) caused by your CPU running at max Clock Speeds all the time? Not 100% utilisation but constantly at the rated clock speed?

Thanks,
Conor
 
Solution
Karsten75
If you are overclocking, I believe that speedstep is disabled, since, and again, this is what I recall (I'm not going to read up on it now) speedstep is a voltage reduction to run slower. Hence overclocking with voltage negates speedstep.
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InfernoxCJC

InfernoxCJC

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Sep 21, 2014
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Thanks for your reply!
What about when overclocked? Again, assuming the system is stable at say 4.5GHz (up from 4.0GHz) is it still okay to have this clock speed constantly? If so, what is the point of Intel SpeedStep?

Conor

 
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Karsten75

Karsten75

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Oct 15, 2009
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If I understand your question right, you're asking

a) is it OK if my car's engine goes max RPM regardless of how fast I'm driving and
b)is it OK if I put a turbo in the engine to make it go faster, regardless of how fast I'm driving?
c) regarding speedstep, the question is then (what is the point of having gears in the car?

In both cases (and in the case of your CPU) the answer is:

No, not really bad, but pointless*

------------------------------------------------------------

*pointless: See stupid, wasteful.
 
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InfernoxCJC

InfernoxCJC

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Hahaha, I get what you are saying but that is a bad analogy as running an engine constantly at max RPM would kill it! But I love you for helping anyway!

My question actually stems from the fact that although SpeedStep seems to be enabled in the BIOS, CPU-Z and Task Manager both show my CPU running at full speed dispite being at ~3% Utilisation, any ideas?

Conor
 
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Karsten75

Karsten75

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If you are overclocking, I believe that speedstep is disabled, since, and again, this is what I recall (I'm not going to read up on it now) speedstep is a voltage reduction to run slower. Hence overclocking with voltage negates speedstep.
 
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Solution
InfernoxCJC

InfernoxCJC

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Oh, okay. I guess that makes sense!
Thanks for your help!
 
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Eximo

Eximo

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You can overclock and leave speedstep enabled, just have to use offset voltages and a set new max boost clock. That way the CPU runs fast when it needs to and idles at the lower power levels.

A little trickier to get right, and you need to do many manual overclocking tests to get the voltage scale right to get stability at all speed ranges.
 
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