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How harmful would it be to disable Cool N Quiet and not use a 3rd party program

post #1 of 21
Thread Starter 
To downclock the CPU when it's idling?

If I leave the CPU at max speed 15-16 hours a day idling at aorund 38-40C, how bad would that be for the CPU?

And will it make a big difference in the electricity bill?
post #2 of 21
It's not harmful at all. These CPUs are rated to run at their standard clocks all the time. Cool and Quiet is just a way to save power (and the quiet part is that when you downclock your CPU its runs cooler so your CPU fan can spin down and be quieter).

How much would you save? Hmm. Well that depends on your usage, I believe your CPU is a 125W TDP model, at full clocks and full load lets just assume 125W 24/7 that's about 90kWH in a month. At 40W (assuming no real usage of any kind) that's about 28.8 kWH in a month as your max likely savings.

KWh are about 11 cents on average so that's a savings of $6.73 / month as your maximum savings (it'd more likely be about half that, so figure roughly $3.50).
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post #3 of 21
You want to disable C-n-Q when OCing,Because your CPU can overheat when C-n-Q throttles down the fan.
BTW I have C-n-Q disabled and no issues here.
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post #4 of 21
Nothing dangerous about disabling it as long as you're on stock clocks. (unless you have an aftermarket cooler then you can also OC )
post #5 of 21
Thread Starter 
I have my 965 at 3.7ghz right now using 18.5x multiplier so that CnQ still works.

However, I've been trying to OC my NB to 2.6ghz, but it seems to be unstable with CnQ enabled. With it disabled, it has passed 20 runs of IBT twice and handled fine when I was playing games.

But the moment, I enable it, my comp would crash right after IBT finishes (I'm assuming this is the point where CnQ kicks in to throttle down the CPU) and while I'm idling (also when CPU is throttled down).

These are the reason that lead me to believe it's CnQ that's causing the instability.

I'm not too worried about fan noise as the fan cooling the radiator of my H50 is only running at 900 RPM (around 60%) when idling so it's not that bad.
post #6 of 21
Yep CnQ can really mess up an OC, always best to disable it when OCing, because you are stressing your CPU beyond its normal limit, and therefore you want to provide it with steady uniform voltage, and not be jumping it up and down.

Good luck with your new stable OC
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post #7 of 21
Thread Starter 
Hmm... so would you guys say the NB OC is stable in my case?

Someone said that's QnC is not to be blamed and that the problem is just an unstable OC.

That would be true if I didn't pass the stress test and if it crashes during gameplay, but it didn't.
post #8 of 21
If you're worried about NB you should run Prime95 Blend test for a few hours, see if any workers give you any trouble.

I would recommend if you haven't already however to bump up your CPU-NB clock speeds to about 2.6 - 2.8 ghz. It helps smooth all transactions on PIIs. You'll need to bump the voltage too, don't remember off the top of my head, 1.25 1.3V? Something like that, should check around to double check though heh. Gettin all sleepy over here or I'd check for you.

I'm still going to stand behind CnQ being bad news for OCing though. Power changes are not flat like we'd like to believe, they're usually spikes that are averaged out to the correct value over time, so if you spike low on a proc that isn't happy with low voltage it's asking for trouble.
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post #9 of 21
i wish amd had something like speed step which drops the multiplier to lower clocks instead of throttling fans.
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post #10 of 21
Thread Starter 
For my NB to hit 2.6ghz, I had to increase the NB/CPU voltage to 1.2875v. So it sounds like it's still in the same range.

I'm bit hesitant about Prime95 because I hear you need to run them for 24+ hours because some people have encountered errors like 15+ hours into the run. I just don't really want to deal with that.
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