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Athlon64, cool and quiet

adairusmc

adairusmc

Diamond Member
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.
 
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.
 
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

 
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
Click to expand...

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.

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

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

Yes, as I've already posted, that is true
 
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.
Click to expand...

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.
 
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.
Click to expand...

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.
Click to expand...


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?
 
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.
 
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.
 
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