Athlon64, cool and quiet

adairusmc

Diamond Member
Jul 24, 2006
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I have read a couple of reccomendations here to make sure cool and quiet is turned off with the Athlon64. Why is that? I am just curious, as I have always ran with it on, but I never really had any problems so I never thought about it too much. Thanks.
 

StrangerGuy

Diamond Member
May 9, 2004
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1. It only saves a tiny bit of power
2. If you using a overclocked A64, CnQ lowering the multiplier and voltage may make it unstable.
 

myocardia

Diamond Member
Jun 21, 2003
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Leave it on if:
1) you have a Skt. 939 processor and don't overclock
2) you have a Skt. 939 processor, and overclock, but leave the cpu at stock vcore
3) you have a Skt. 754 chip/processor with only one stick of RAM, not overclocked

Turn it off if:
1) you have a Skt. 754 chip, and have more than one stick of RAM, even at stock speeds*
2) you overclock, and have raised your vcore, with any processor
3) you own one of the 754 motherboards that don't do CnQ very well

* this only applies to some motherboards, and some steppings of the processors, it seems

 

Unkno

Golden Member
Jun 16, 2005
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Originally posted by: myocardia
Leave it on if:
1) you have a Skt. 939 processor and don't overclock
2) you have a Skt. 939 processor, and overclock, but leave the cpu at stock vcore
3) you have a Skt. 754 chip/processor with only one stick of RAM, not overclocked

Turn it off if:
1) you have a Skt. 754 chip, and have more than one stick of RAM, even at stock speeds*
2) you overclock, and have raised your vcore, with any processor
3) you own one of the 754 motherboards that don't do CnQ very well

* this only applies to some motherboards, and some steppings of the processors, it seems

well, CNQ doesn't always work if you're overclocked at stock vcore. it depends on how far you're able to overclock the system at stock vCore. For example, my x2 3800+ is able to oc to 2.5ghz at stock voltage, turn CnQ on and it would BSOD when the cpu switches from load to idle.

same goes with overclock with applied voltage; sometimes it works, most of the time it doesn't. The easiest way to test if your system will be stable at CnQ is turning off CnQ, then running the multiplier at 5x and then running the vCore at the voltage when CnQ is on (during overclock), then run prime95.

 

5t3v0

Senior member
Dec 22, 2005
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myocardia is not correct in saying to turnn it off with a raised vcoare. I overclock my Opteron on a 1.5v vcore and use CnQ successfully. It down clocks from 2.5GHz/1.5v to 1.4GHz/1.2v. Keepes the cpu temp at c. 35C and the fan below 1000rpm, cool and quiet like it says on tin! As with all these things, try it out for yourself. If you get instability, try programs like RMClock or Clockgen which are more configurable.

PS. You need a driver from AMD installed as well as enabling CnQ in the BIOS.
 

DAPUNISHER

Super Moderator CPU Forum Mod and Elite Member
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Why turn it off?
Because when the system is crunching a DC project 24/7, it is useless anyways.
 

996GT2

Diamond Member
Jun 23, 2005
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C&Q works fine with my AM2 3500+ at 2.66 GHz. I am at stock voltage though (actually a bit less)...I'm pretty sure it would also work even with overvolting if a program like RMClock is used to set the voltage for each speed stepping manually. That way there can be no chance of BSOD from the CPU not getting enough voltage.

Also, another case in which C&Q should ALWAYS be off is when overclocking with a less than max multiplier. For example if you have a 2.2 Ghz chip (11X multi) and you lower multi to 10 and raise HTT to 250 (2.5 GHz), then C&Q CANNOT be on unless a program like RMClock is used to turn off the last 11X stepping. Without this, the CPU would go to 11X multi at full load when you intended it to be 10X and crash your system because now the computer is running at 2.75 GHz versus the 2.5 originally intended.
 

orangat

Golden Member
Jun 7, 2004
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I don't turn it off and its always on. Power savings of up to 75% is possible.
 

videopho

Diamond Member
Apr 8, 2005
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So how C&Q works is it controls Vcore as required by cpu load or more than just that? I have seen Vcore varies from 1.11v up to 1.40v as cpu load increases, using pc-wizard monitor.
From what I've read so far, it sounds like some users have had mixed results with C&Q enabled or disabled. So it is a trail & error on your part, I guess?
 

DAPUNISHER

Super Moderator CPU Forum Mod and Elite Member
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Originally posted by: videopho
So how C&Q works is it controls Vcore as required by cpu load or more than just that?
It is just PowerNow! brought to the desktop. "It dynamically adjusts frequency and voltage *up to 30 times a second*"
 

orangat

Golden Member
Jun 7, 2004
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Originally posted by: videopho
So how C&Q works is it controls Vcore as required by cpu load or more than just that? I have seen Vcore varies from 1.11v up to 1.40v as cpu load increases, using pc-wizard monitor.
From what I've read so far, it sounds like some users have had mixed results with C&Q enabled or disabled. So it is a trail & error on your part, I guess?

CnQ also automatically adjusts the cpu frequency. It can go down to 1Gz.
 

imported_inspire

Senior member
Jun 29, 2006
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I don't use it largely because I'm ignorant of it, and I plan to be OC'ing soon. The Scythe Mine I have is incredibly quiet, so, for me, I have to weigh it based solely on the power-saving allowed by CnQ. But, I'm happy with the CnQ being disabled, so I just don't tweak it.

Some good information in this one, though - thanks.
 

dorion

Senior member
Jun 12, 2006
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I keep Cool ana Quiet on even when overclocking. I force my own settings with CrystalCPUID. This way I can run high voltage on full throttle, and switch to low voltage when idle. If I can ever understand Clockgen I'm going to make it so I go from min FSB and voltage, to Max fsb and stable voltage.
 

5t3v0

Senior member
Dec 22, 2005
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I think CnQ becomes a problem when you lower the multiplier to achieve an overclock. This is because the driver sets the cpu back to the default multiplier which then exceeds the maximum stable speed and crashes the system. Can anyone confirm this?
 

996GT2

Diamond Member
Jun 23, 2005
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Originally posted by: 5t3v0
I think CnQ becomes a problem when you lower the multiplier to achieve an overclock. This is because the driver sets the cpu back to the default multiplier which then exceeds the maximum stable speed and crashes the system. Can anyone confirm this?

Yes, as I've already posted, that is true
 

WobbleWobble

Diamond Member
Jun 29, 2001
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Originally posted by: 5t3v0
myocardia is not correct in saying to turnn it off with a raised vcoare. I overclock my Opteron on a 1.5v vcore and use CnQ successfully. It down clocks from 2.5GHz/1.5v to 1.4GHz/1.2v. Keepes the cpu temp at c. 35C and the fan below 1000rpm, cool and quiet like it says on tin! As with all these things, try it out for yourself. If you get instability, try programs like RMClock or Clockgen which are more configurable.

PS. You need a driver from AMD installed as well as enabling CnQ in the BIOS.

Not in my experience. When C&Q kicks in, it sets the voltages back to default for me. But if you're overclocking, upped your voltage want want something similar to C&Q, definitely check out RMClock.
 

5t3v0

Senior member
Dec 22, 2005
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Originally posted by: WobbleWobble
Originally posted by: 5t3v0
myocardia is not correct in saying to turnn it off with a raised vcoare. I overclock my Opteron on a 1.5v vcore and use CnQ successfully. It down clocks from 2.5GHz/1.5v to 1.4GHz/1.2v. Keepes the cpu temp at c. 35C and the fan below 1000rpm, cool and quiet like it says on tin! As with all these things, try it out for yourself. If you get instability, try programs like RMClock or Clockgen which are more configurable.

PS. You need a driver from AMD installed as well as enabling CnQ in the BIOS.

Not in my experience. When C&Q kicks in, it sets the voltages back to default for me. But if you're overclocking, upped your voltage want want something similar to C&Q, definitely check out RMClock.


What driver version do you have? I have 1.2.2.2 which I downloaded in January. I dont have any problems with it at all. Perhaps the BIOS has a part to play here?
 

akugami

Diamond Member
Feb 14, 2005
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RMClock FTW.

When web browsing or doing light work, I set it on Power Saving (4x multiplier, lower vcore) and when I do heavy work, I set it to Maximal Performance. I never liked RMClock's Performance on Demand mode as certain task seems to take whatever CPU cycles you give it but don't really require high CPU. RMClock thinks you need the added power and boosts the performance up.
 

Zebo

Elite Member
Jul 29, 2001
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Computer seems less snappy with it on so I don't use it..I think CPU is really just operating at half it's speed when doing file navigation, web browsing etc and I can feel minute differences like that being the sinsitive guy and I am.