Lowering cpu temperatures

[Carl Price]

Programs like rain, cpuidle, waterfall have the objective of lowering cpu temperatures while the computer is running. I know a lot has been discussed about these programs and some mainstays of the board do not like them (Reboot for instance). This link discusses these programs and how they work. I was surprised to learn that during testing the temperature of a Celeron process was lowered over 30%. Makes great reading.

[Hpro]

I can't tell for other people here but I can say out of experience that CPUIDLE the versions I tried will leep the CPU at almost 100% of running - and so for how should it possibly help to get the heat down ? What for you need CPUIDLE if all you have to do is just to enable Power management - which will reduce power to the cpu while on idle..

The programs you noted - I tried them all - and all with the same effect here.. sorry to have to disagree with that..

[Paul Victorey]

No, you misunderstand.

You are correct that these programs DO execute instructions, and they are designed to keep the CPU at 100% operation. But instead of doing a bunch of NOP commands (which is what System Idle will be doing when it's not doing anything else) it executes "sleep" commands which reduce CPU power consumption.

Essentially, to the CPU, it ALWAYS executes a command of some form every cycle; it cannot do anything else. This changes the command it executes when there's nothing else going on("suspend" instead of "NOP").


I think this is essentially what any power management program does, be it built in or third-party.

[Hpro]

Paul I know what you mean and I do not even think to question your statements.

Now look at it from that side - My computers CPU is when idle at 0 % -2% of useage - I have a HARDWARE temp meter connected to the CPU DIE - it usually reads 48 - 50 degrees - I'm living in a hot country - right now it's 50.7 celsius.. if I leave the computer on like that with open internet and all apps -the CPU still reads only 0 - 2 % unless I go and click or that OE is receiving a mail in the background or likewise.. Powermanagement isn't set active at that point as the timer starts to count form the point where you made your last move or pressed the last key on the keyboard..

leaving the system on like that droppes the heat down to 46 degress after about 5 minutes with Powermanagement set to act within 15 minutes.. and there I only disable the SCREEN so the computer is full awake..

NOw when I tested those apps - my CPU heat would increase by about 5 degress Celsius - now I know this is may hard to prove as long you can't sit on that computer but if you get a CompNurse and measure the CPU HEAT DIRECT the way I did then you may have the same or similar outcome..

Hope you understand

[Paul Victorey]

Strange; I've never heard of these apps actually increasing the temp. I don't doubt that it's happening as you say, I just think it's strange. Maybe someday I'll put some temp. sensors on CPUs in a couple computers and test the programs myself; my entire knowledge of the benefits is second-hand, relying on data from tests run by magazines and the like.

[Hpro]

I can say this one - Ont he OC/ed Pro it will increase about 5 degrees - running prim95 - is a CPU stressing program - will increase only 3 degrees after one hour time -

The fact is a CPU running at 1-10% load takes less ampereage than a CPU running always under full load.. I had to replace the CPU fan because of this with a stronger one - this one has 6500 RPM and has a 2Inch thick rotor blades in 3 inch width.. it's making some noise but this is bearable.. better that a overheated CPU..

I have tried this using ASUS PROBE on the Plll - not OC/ed - and running heavy stuff for a longer period of time also increases the heat - but not much - max 5 degrees..

[KierovNick]

My proposition is....
Liquid Azot

[Mad Dave]

There is a guy in the General Hall going on about a product called 'Arctic Silver' that is worth a look, on the thread "Best $8 I ever spent".
Dave

I would have put a link, but, well, I'm a bozo.