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Cool 'n' Quiet, good / bad?

post #1 of 21
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So I got my comp up to 2706 (stock cooling!! 49C Max load), 246x11, and I decided to see if Cool 'n' Quiet would still run because I don't need all that power 24/7. It's running just fine right now at 1230, 246x5. I heard some bad things about Cool 'n' Quiet + OCing, but I'm thinking it shouldn't matter because I reached my maximum OC using my max multiplier. What's the deal?
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post #2 of 21
Bad. Cool and quiet will lower your multiplier to lower the temps and speed, hence decreasing performance. Have it disabled so it doesn't fudge with your o/c.



Nice o/c by the way. But those temps are the norm for overclocked 3700's on stock cooling, don't feel bad
    
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post #3 of 21
When you get a little warm...your o/c will back down. Trust me, you will not want C+Q on when you're playing a game.
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post #4 of 21
Cool and Quiet will slow your processor down when the performance isn't needed. The problem lies in the fact that when your processor wakes up from Cool N Quiet, it will return to stock settings and your OC will be overriden.
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post #5 of 21
Quote:
Originally Posted by Komet
So I got my comp up to 2706 (stock cooling!! 49C Max load), 246x11, and I decided to see if Cool 'n' Quiet would still run because I don't need all that power 24/7. It's running just fine right now at 1230, 246x5. I heard some bad things about Cool 'n' Quiet + OCing, but I'm thinking it shouldn't matter because I reached my maximum OC using my max multiplier. What's the deal?
Unlike all the people before me, I think cool'n quiet is a great feature, at it may be good while overclocking. The advantage of c'n q is that is drops the freq and the voltage of the cpu only when you don't need full power (like watching a movie, mp3s, playing heroes3 ). The response time when the load on the CPU increases if so small that you don't evan notice it had lower frequecy. It cam be measured in miliseconds, I don't think many of us can sense such a difference.
While OC-ing there is a voltage related issue. This applies only if the cpu is overvoltaged when OCed. As I said, the c'n q drops the frequency of the cpu, but it drops the Vcore also. The thing is it the drop in Vcore can be a little too abrupt to alow you to retain stability.
For ex: my A64 2800 runs OCed with c'n q enabled. At full speed it runs at a core voltage of 1.575V (when 9x multi is used) and it drops to 1.175V when idle (5x multi). I checked how it behaves with c'n q disabeled and I can retain stability with only 1.55V. The bottom line is that I have to overvolt it a little more to gain that stability when it balances between 5x and 9x multi, but the good thing is that during movie playback it doesn't heat up since it is idle at 5x and the fan stays at low RPM. This makes it worth since I hate hearing the fan blowing at 5000RPM while watching movies or listening to music.
BTW c'n q controls also the fan speed if it is a stock AMD fan, mine varies between 3000 (can't hear it) and 5000 depending on the temp of the CPU.

Since I'm the only one that seens to like this feature I advice you to check if your system is stable after enabling it. After all, it depends of the type of user you are if you find it useful or not.
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post #6 of 21
Cool N Quiet will override your BIOS settings when it turns your processor back up from being throttled down. You might as well turn your BIOS settings back to stock because that's what you're getting after Cool N Quiet awakens your cpu after slowing it down.
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post #7 of 21
I agree that cool+quiet is a nice feature, but I perfer RM clock where I have full control with multiplier and Vcore settings depending on system load. This allows my CPU to run with very low power and temp at idle(1.0V/4xmult). This program is also free and easy to turn of if you want full performance while playing games and doing benchmarking.
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post #8 of 21
Cool n Quiet does not disable or overide my BIOS settings when I move from idle to full load. I make use of this feature and have never seen a problem however you may notice that my voltages and overclock are not extreme.

Stability is number one in my books and there are those who wish more extreme overclocks and who in their cases might not benefit from this technology.

I do benefit from it. I like it and it does not change my overclock maximums when moving from idle to full use.

R
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post #9 of 21
Quote:
Originally Posted by Ropey
Cool n Quiet does not disable or overide my BIOS settings when I move from idle to full load. I make use of this feature and have never seen a problem however you may notice that my voltages and overclock are not extreme.

Stability is number one in my books and there are those who wish more extreme overclocks and who in their cases might not benefit from this technology.

I do benefit from it. I like it and it does not change my overclock maximums when moving from idle to full use.

R
Interestingly enough, I think that this is the way that CnQ behaves with mine, as well. When I was running my stability tests with my 3200+ at 2.5, I ran it once with CnQ enabled and once with it disabled. There seemed to be little to no difference. Also, CPU-z was showing my processor at the correct speed (2500mhz), but my Vcore had dropped back down to 1.4 on idle instead of remaining at the 1.45 that I had set it at.

If you look at this thread, you can see that it knocked this other guys 3200 down to 1400mhz on idles/loads, though. Once he disabled it, his overclocking was able to continue.

Personally, I have since disabled CnQ and I don't really noticed a difference either way. However, my results when it was enabled and the other guy's results with it enabled show vast differences in exactly what it is doing. That being said, it looks like the function and performance of CnQ is differing by motherboard.

Does anyone know if CnQ carries a universal functionality (ie, the same across boards) or is it up to the motherboard manufacturer to alter certain specifications of it for performance issues? I think it's something that we should look at.
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post #10 of 21
And how exactly do you disable it?
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