AMD Cool & Quiet on OC'd rigs?

[perdomot]

A buddy asked me if he should enable this on an OC'd rig and I think you should as the system should ramp up when more performance is needed. Am I wrong in this?

 

[flexcore]

It seems if you don't OC to much it will work. I have turbo off with C n Q on, OCed to 3.5 and have no problems. This is a YMMV situation. I know most suggest to turn off ALL power and turbo features in the BIOS when OCing. You can try it and if it doesn't work..... you have your answer.

 

[superccs]

If you OC at stock voltage then CnQ enabled going to work fine.

 

[Zap]

I know most suggest to turn off ALL power and turbo features in the BIOS when OCing.

I know this is considered SOP, but I've been leaving all power features enabled on my systems. Why wouldn't I want my CPU to clock down (using less power and creating less heat) when I'm not stressing it? Of course I'm not going for maximum overclocks nor am I a benchmarking fiend. I just want a bit better oomph with my overclocks, plus I've been overclocking forever (heck my 386DX25 was overclocked to 27MHz!).

 

[hdfxst]

I have CnQ disabled and use phenommsr tweaker.you can set your voltage and multi lower than QnC also you can set the threshold so it ramps up faster and you don't lose performance.I run 270x14 @1.40v. and on power saving 270x7 @0.925v and 45% threshold

 

[BD231]

Make sure to tell him to leave it on, you directly increase the life your chip by letting it down clock and under volt when it's idle or being used for the internet.

This is especially true if you've added more voltage for overclocking. It used to be that C&Q would not work past a milti of 17, that is no longer the case so no matter what clock speed/voltage you're running you *will* benefit from turning it on.

As Zap stated there's no sense in letting your chip eat up more voltage than it needs to, turning off C&Q definitely works against you.

 

[flexcore]

It seems I used to hear more about problems while leaving options enabled. Now don't hear to much. I agree that you should go for an OC that allows CnQ. I even see some really nice clocks with turbo on nowdays. I think BIOS has been ironed out over time.

 

[spdfreak]

my 1075T at 3.5 has it enabled with no problems. Turbo works fine too. You can set the turbo multi in most bios to whatever you want. Mine tops out at 3.75GHz.

 

[jacktesterson]

I will test out c&q on my new Crosshair board

With my last board, a m4n98td Evo, it would not clock down no matter what I tried with mu o/c'd 1090t

980a works ok but just is not as refined.

I'll see what my 890fx does this week when I get a chance

 

[Throckmorton]

What is the reason for disabling it? Does it reduce voltages to set amounts? That could create problems if the voltage is at a stock level, but the clock at the reduced speed is higher... and your data is corrupted. How can you test that? Not with Orthos because that will make the clocks and voltage go back up to normal.

 

[Zap]

What is the reason for disabling it? Does it reduce voltages to set amounts? That could create problems if the voltage is at a stock level, but the clock at the reduced speed is higher... and your data is corrupted.

That's one reason, but IIRC BITD when Cool & Quiet first was introduced, people were claiming to have "lost" performance because for some reason many claimed that it wasn't going back up to full speed when needed - that it lagged a bit at lower performance before returning to full performance. I don't know if it was true or one of those things that enthusiasts/techs perpetuate, like System Restore being evil just because WinME had a crappy implementation, thus souring a whole generation of techs to the idea. I personally felt that it operated transparently.

 

[Jhatfie]

I leave it on with my Phenom II OC'd to 3.6 at stock volts, no issues. I think that potentially it could cause stability issues on a highly overclocked rig when CnQ was enabled and the system undervolted while the other settings were still left at a high level as CnQ just drops the voltage and multiplier.

 

[BD231]

What is the reason for disabling it? Does it reduce voltages to set amounts? That could create problems if the voltage is at a stock level, but the clock at the reduced speed is higher... and your data is corrupted. How can you test that? Not with Orthos because that will make the clocks and voltage go back up to normal.

It down clocks and undervolts based on your multiplier and voltage settings. If you up your voltage, your voltage while down clocked by C&Q goes up as well. If you up your multi, your downclocked clock rate with C&Q enabled goes up.

It's implemented perfectly for overclocker's.

 

[dvijaydev46]

If you OC with increased vcore, C&Q disables automatically leaving the CPU to run hot all times. I use Phenommsrtweaker to adjust CPU multi and decrease vcore to save power when idle. Check out how to overclock and save power here http://mytechencounters.wordpress.c...our-phenom-cpu-and-save-power-simultaneously/

 

[perdomot]

I have both my multi and my vcore above spec and C&Q does lower both on my rig.

 

[birthdaymonkey]

On my system (Gigabyte 785 DDR2 board and Phenom II 555 @3.83), CnQ works fine until I set the multiplier to 19, at which point the motherboard seems to disable it automatically. So I left the multi at 18.5 and upped the FSB a few MHz to get to my max stable OC while keeping the benefits of CnQ. At 207 it will stress test for hours without issue; at 208, bluescreen within half an hour of Prime95. I haven't upped the vcore though, so I don't if this would disable CnQ or not.

 

[busydude]

On my system (Gigabyte 785 DDR2 board and Phenom II 555 @3.83), CnQ works fine until I set the multiplier to 19, at which point the motherboard seems to disable it automatically. So I left the multi at 18.5 and upped the FSB a few MHz to get to my max stable OC while keeping the benefits of CnQ. At 207 it will stress test for hours without issue; at 208, bluescreen within half an hour of Prime95. I haven't upped the vcore though, so I don't if this would disable CnQ or not.

Did you overclock your CPU-NB?

 

[dvijaydev46]

I have both my multi and my vcore above spec and C&Q does lower both on my rig.

well, C&Q gets disabled when you up the multi too much. Even for me at 19X, it stops functioning. But my 940 isn't stable at 3.8GHz anyways. So I run it at 3.6 with 18x multi with upped Vcore using Phenommsrtweaker as even at 16x, original C&Q crashes my system sometimes.