AMD64's Cool n Quiet

effee

Golden Member
Sep 4, 2004
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I have the ASUS K8V SE DLX mobo, and it supports Cool N Quiet, unfortunately, I have no idea how to enable it. What are the benefits for me to run it? And is it worth it enabling cool and quiet? will it result in my system being less stable?
 

ross8425

Member
Aug 11, 2004
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you would enable it in the bios i should believe. i think it controls your fan speeds, i have no idea. i have it but i dont use it
 

laurenlex

Platinum Member
Feb 26, 2004
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I think it underclocks the processor when under a light load, therefore consuming less power and lowering fan speed. I don't have an A64 (yet), but I did stay at a Holiday Inn Express last night.
 

WW2Planes1

Member
Mar 11, 2003
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Originally posted by: GhandiInstinct
I don't have an A64 (yet), but I did stay at a Holiday Inn Express last night.


LMFAO

Wow, what a genius!

Second that...
I did not stay at a Holiday Inn, but I do have an Athlon64.

Cool 'n' Quiet should be enabled in the BIOS, but I don't know exactly where in the K8V BIOS...
It's basically the same thing as Power Now for laptops. When your CPU is idle (or light load), it lowers your core voltage. My Vcore right now is 1.088V. This causes your clockspeed to drop, in my case it drops to 1GHz (I have a 2GHz 3000+).

It also means that your CPU runs really cool in Idle... I'm at 32C on the Proc w/ stock cooling. My mobo temp is actually higher - 35C (athough, I'm not sure of the accuracy of these temps, haven't looked into what the errors are for my K8N-E).

I haven't noticed any stability issues when running it. When I start up a game, the clock speed ramps back up to 2GHz without a hitch.
 

HumblePie

Lifer
Oct 30, 2000
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Also, beware, cool and quiet on MOST motherboards can only be enabled when you have one and ONLY one ram stick. If you are using two sticks of memory you may not get anything out of enabling cool and quiet through the bios.
 

McArra

Diamond Member
May 21, 2003
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Originally posted by: HumblePie
Also, beware, cool and quiet on MOST motherboards can only be enabled when you have one and ONLY one ram stick. If you are using two sticks of memory you may not get anything out of enabling cool and quiet through the bios.

It works with 2 sticks in the Asus :D
 

Algere

Platinum Member
Feb 29, 2004
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Originally posted by: McArra
Originally posted by: HumblePie
Also, beware, cool and quiet on MOST motherboards can only be enabled when you have one and ONLY one ram stick. If you are using two sticks of memory you may not get anything out of enabling cool and quiet through the bios.

It works with 2 sticks in the Asus :D

Ditto
 

Algere

Platinum Member
Feb 29, 2004
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Originally posted by: MrCodeDude
To enable it. Turn on Cool in Quiet and also turn on ACPI 2.0 in your BIOS's Power options.
P.S. under Windows, set power options to "minimal power management".
 

Algere

Platinum Member
Feb 29, 2004
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"I have no idea how to enable it."
Have you read the manual?

"What are the benefits for me to run it?"
1) Lower heat production within the case
2) Increased life expectancy for the CPU & other components within the case.
3) Decrease in electricity bill
4) Decrease in CPU fan RPMs ergo lower sound levels from CPU fans.

"And is it worth it enabling cool and quiet?"
*Matter of preference*
It's disabled on my system. Reason being; opening/browsing of the start menu feels less responsive to me, benchmarking, and in the past I'd get audio corruption in certain situations.

"will it result in my system being less stable?"
Will probably make your system more stable
 

LocutusX

Diamond Member
Oct 9, 1999
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Originally posted by: Algere
"And is it worth it enabling cool and quiet?"
*Matter of preference*
It's disabled on my system. Reason being; opening/browsing of the start menu feels less responsive to me, benchmarking, and in the past I'd get audio corruption in certain situations.

I also felt that way, but thought it was just placebo...

FYI it works fine with 2 DIMM sticks on the just-reviewed Asus K8N-E as well... even overclocked - but when overclocking make sure your mult. is left at default.

As for it lowering fan speeds, I don't believe it does. However, the AMD stock fan is supposed to have a temperature sensor which raises/lowers fan RPM when appropriate. In my experience, that has NEVER happened, and it ALWAYS runs at 3300rpm. My A64 is from the retail package.

So, the reason why Cool n Quiet seems to "require" the AMD stock fan, is because it was supposed to have a temperature-sensing fan throttler, which provides the "Quiet" portion of CnQ.
 

gevorg

Diamond Member
Nov 3, 2004
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Is Zalman 7000B-Cu compatible with Cool'n'Quiet?

I have an Asus K8N-E w/ Newcastle 3000.
 

flawlssdistortn

Senior member
Sep 21, 2004
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Cool n Quiet lowers your clockspeed by adjusting the multiplier. I have the 3500 and there are 4 speeds - 2.2Ghz, 2.0Ghz, 1.8Ghz, and 1.0Ghz. The great thing about this feature is that there is NO performance losses.
 

Budman

Lifer
Oct 9, 1999
10,980
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Originally posted by: HumblePie
Also, beware, cool and quiet on MOST motherboards can only be enabled when you have one and ONLY one ram stick. If you are using two sticks of memory you may not get anything out of enabling cool and quiet through the bios.

I didnt know that HumblePie.

I could never get cool & quiet working on my Chaintech motherboard but after seeing you post I decided to remove 1 stick from my box & it worked prefectly.

Glad i (or should I say you ;) ) finaly figured out why it would never work before.

512 megs & C & Q on vs 1gig of ram and no c&q .... I guess I would rather run with 1 gig of ram :)
 

Budman

Lifer
Oct 9, 1999
10,980
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Originally posted by: flawlssdistortn
I don't have any problems with cool n quiet and my 2 sticks of corsair value ram.

do you have a Chaintech VNF3-250 ?

I am just saying the Chaintech VNF3-250 has a problem with 2 double sided sticks and C&Q.

Mine are Crucial pc3200 2.5v cas3.
 

cyberknight

Senior member
Sep 3, 2004
378
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Originally posted by: LocutusX
As for it lowering fan speeds, I don't believe it does. However, the AMD stock fan is supposed to have a temperature sensor which raises/lowers fan RPM when appropriate. In my experience, that has NEVER happened, and it ALWAYS runs at 3300rpm. My A64 is from the retail package.

My Soltek SL-K8AN2E-GR also doesn't appear to lower the RPM of my fan. I think fan control is more motherboard related rather than the CPU. My motherboard also gives me some questionable temperture readings (like when my CPU is at the lowest clock speed, my reported temp actually rises for some strange reason) And when I put load on it, the temp goes back to "normal".

I leave CnQ on though, doesn't bug me. And I experience no slowdowns when playing Doom 3 or Wolf:ET.
 

LocutusX

Diamond Member
Oct 9, 1999
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You won't experience perf slowdowns in *games* but rather in regular Windows usage, where an app will spike to 100% cpu usage and cause an intermittent jerkiness - noticeable to a human. Since the CPU has to be at 100% for a particular amount of time for CnQ to "kick in" and raise CPU speed to 2000mhz+, it might not kick in for certain situations.
 

Squally Leonharty

Senior member
Oct 5, 2004
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Originally posted by: gevorg
Is Zalman 7000B-Cu compatible with Cool'n'Quiet?

I have an Asus K8N-E w/ Newcastle 3000.

It's worth mentioning that Cool 'n' Quiet does NOT control the fan speed. Q-Fan does, so enable that as well. Q-Fan alters the fan speed depending on the CPU temperature. The temperature, in return, depends on Cool 'n' Quiet. See the link? :)

So basically:

Cool 'n' Quiet controls the CPU multiplier and voltage, resulting in less power usage and lower temperatures.
Q-Fan controls the fan speed, resulting in a quieter case and good temperatures (depends on CnQ).

Hope that clarifies some things. :)

Oh, and Q-Fan works fine for my Zalman CNPS7000B-AlCu. The fan actually rotated at 1500 RPM while the CPU was at 27 - 30 degrees C. I disabled Q-Fan, though, because I don't really like it. I just want the CPU to be as cool as possible, so yeah: it's now rotating at 2500 RPM and it's hardly audible. The lowest CPU temperature I got is 26 degrees C and usually stays that way unless I do something intensive, which increases the temperature to max 40 degrees C if it's at 100% for a long time. :)