Why disable Cool n' Quiet?

[2kfire]

Why is it bad to have CnQ enabled when overclocking? I've read on several posts that it should be disabled when OC'ing, but never any reason why 😕 I ask because I have it enabled, with the OC in my sig, and my computer hasn't frozen/crashed etc once since I last installed windows (about 3 weeks ago).

 

[cw42]

Well, some people arn't so lucky and it can cause stability problems.

 

[2kfire]

So, as long as my computer is stable, it's okay to leave it on?

 

[Furen]

Yes. The problem is that sometimes your CPU cant take the overclocked speeds at the lower P-states (a pstate is, roughly, a voltage/multiplier combination). If you dont experience any problems using the lower pstates (this is hard to test since the CPU will ramp in clock and voltage as soon as you load it, but it could still lead to problems in idle/close to idle situations) then you're fine.

EDIT: the reason why we recommend disabling c'n'q is that we dont want to have to deal with someone whinning that their computer is having random crashes since when they ask for help they most likely wont mention they have left cool and quiet on.

 

[Megatomic]

Of course. Have you tried stressing your system with something like Prime95 yet?

 

[biostud]

also *I think* some has problems using it with dualcores since an unused core might activate CnQ for both cores.

 

[stevty2889]

The problem with C&Q with overclocking is this. A lot of times you have to increase your voltage to get a stable overclock at a certain speed. Say you overclocked to 2.618ghz like me, but I had to raise my voltage to 1.475. C&Q lowers the CPU multiplier, and lowers the voltage. But it doesn't lower your HTT, so even when it lowers the multi..you are still overclocked, but now you are running with a lower voltage..and that lower voltage may not be enough to keep you stable since you are still overclocked..

 

[2kfire]

Thanks for all your help! I guess I'll keep using CnQ then. I am at default voltage, so I don't need to worry about the lower max voltage. I haven't had ANY problems at lower P-States yet (my computer spends too much time idling... not enough time for games with college and all 🙁). And yes, I am >25 hrs prime stable. That's at the 'blend' setting. I was going to try SuperPI last night, cuz I hear it catches what Prime doesn't, but I slept instead. Maybe I'll try it tonight 🙂 Again, thanks for all the help everyone!

 

[aka1nas]

If your board allows you to leave voltage and multi at sotck and overvolt through another setting, then you can probably OC with CnQ without any problems. I have done so on a winchester and an X2 system with success.