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Nicky
22-06-04, 13:02
Hi techies http://www.tombraiderforums.com/images/smilies/wave.gif

I've been told about this utility (CPUIdle) which is used to cool the temperature of PCs, especially laptops that sometimes shut off by themselves, probably due to high temperature. What is your opinion about it? Would you recommend it?

Joseph
22-06-04, 13:33
Hi Nicky. Could be useful yes. :D

Let the satisfied customers speak:
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User Comments

Now my PC doens't crash anymore due to overheating. When I was surfing on the internet or working in VS.net, the temp op the CPU rised up to 65C, now it's only 43-45C. This is just amazing. :D

..Miejas..

I just downloaded cpuidle and I must say that I'm really happy with it! My 1300Mhz AMD Morgan is usually @46C but now it's @29C! I don't have any actual reason to contact you but I'm just so happy right now that I have to ;)

..Niko Rautiainen..

I am very pleased with the performance CpuIdle which is maintaining my Athlon XP temperature below 50c The way it integrates with MBM is brilliant. A truly excellent little program!

..Peter Page..

Just want to thank you for a great program! [...] I installed it on my machine and the CPU temperature instantly dropped from 45 to 30 degrees while the PSU fan slowed down to a hardly hearable speed... now it's really quiet!

..Robert..

Cpuidle rules! I`ve got a high end machine with GeForce 4 Ti and 400Mhz DDR`s and all that makes temperature inside my case raise dramatically (50 degrees). My Athlon XP 2000+ was 70 degrees. When I run CpuIdle I couldn`t believe it - it took just seconds to lower my cpu`s temp to 44 degrees!

..Pawel Szydco..

I got new processor (Athlon XP 2000+) last week and I noticed that it make much more heat than my old Thunderbird 900. So, I drop a look at internet for "cooling program" and found CpuIdle. I took the version 6... and I almost got a shock! Temperature of CPU went down for 15 degrees! Present temperature of Athlon XP 2000+ is lower than it was with the double slower Thunderbird CPU. I'm completely fascinated by CpuIdle Pro!

..Nightwolf..

CpuIdle is my new best friend in the war against heat. My system runs 10c degrees cooler than before. This allows for a quieter case and a happier CPU. The tech support is amazing. I wouldn't be caught without this program again!

..Curtis Cozier..

Having worked in IT for 27 years I have to say CpuIdle is the most useful software I have ever seen. Well done. It's a pity hardware vendors don't install it as standard.

..Ron Sheldri..

I just wanted to comment on how great CpuIdle is. My Palamino XP1600+ went down 10 degrees. WOW! if you need some great cooling then this is for you.

..Peter W..

First of all, I want to thank you for creating this great utility! It works beautifully on my dual pentium machine. I can now shut off the fans on both cpus until the temperature gets to 45C which it rarely does because most of the time the cpus are idle!

..Stan Rosenberg..

Thanks for making CpuIdle, before my Athlon XP 2100 used to idle at 58C, now its down to 22C. Amazing.

..David Luong..

The biggest invention... since watercooling! This program has got some wow factor congrats fly out for this fine piece of software.

..Pete Manaras..

Your program works far beyond my expectations! It was 'normal' that my CPU (XP 1800+) temp was 15 degrees above case temp. Now it is 2-4 degrees above case temp. I have removed the extra fan I placed so the whole system is also more silent.

..Frits Kemp..

Thanx for making cpuidle...I have a copy of cpuidle and now I am convinced that it was the best program I have on my system...

..Reginald Janetzki..
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[ 22. June 2004, 14:48: Message edited by: joseph ]

Joseph
22-06-04, 13:50
How does CpuIdle work?

Why CPUs Produce Heat

Due to CMOS technology modern microprocessors are manufactured not only with transistors but also capacitors and resistors. The resistors create heat that must be conducted away from the processor.

Classic Cooling Methods

Removing the heat from the CPU core is easier with higher temperature gradients. For this reason microprocessors are not only equipped with large heat sinks but also actively cooled with fans or Peltier cooling elements. Higher temperatures worsen parasitic effects like electromigration or oxide breakdown that might eventually lead to failure. A temperature increase of 10 degrees centigrade means a halfed lifetime for chips. This holds true for the microprocessor and for the voltage regulation module (VRM) that supplies the I/O and core voltages. Many outdated or cheap motherboard designs employ passive VRMs that generate additional heat in the PC.

The CpuIdle Approach

Under normal circumstances the CPU isn't always active but spends much time waiting for the keyboard, harddisk or CD-ROM. What would be more logical than to turn off the CPU for that period? That's exactly what the HLT machine instruction (Opcode F4) does. Whenever the CPU encounters a HLT instruction the clock is halted and the CPU enters suspend mode until an interrupt, NMI, or reset happens. With the advent of power saving microprocessors like the Cyrix Cx486S the HLT instruction elicits an additional benefit. When "Suspend on HLT" is enabled in the configuration register the processor not only stops on HLT but also enters the power saving suspend mode.

Why Doesn't Windows Do That?

Modern operating systems like Linux execute the HLT instruction in an idle priority thread. This thread is always executed when the CPU is otherwise idle. No additional execution time for HLTing is needed, the CPU will not run slower.

While other operating systems like Linux always used this mechanism, Windows only learned it with NT. But even with NT and following versions it is only enabled when the BIOS and ACPI implementation is recognized by the OS.

The Chipset Part

With modern chipsets like VIA KX or SiS 7x5 an additional variable enters the equation. These chipsets need to be specifically programmed to allow the CPU entering the HLT state. Windows itself does not perform this programming (chipset optimization in CpuIdle), the BIOS must handle it- which many, even modern, BIOS implementations don't do.

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http://www.cpuidle.de

laracroft8290
22-06-04, 14:09
I think that may be built into the next gen Intel chipset the LGA775 one where the CPU has no pins. What's going to scare you about it, is that Intel has locked the bios completely so there will be only increases of speed by about 10% maybe 15-20% if you use a crack. After that the computer crashes http://www.tombraiderforums.com/images/smilies/c-1.gif

Nicky
22-06-04, 14:46
Thank you, joseph http://www.tombraiderforums.com/images/smilies/smile.gif That was very helpful! http://www.tombraiderforums.com/images/smilies/thumb.gif Thanks for the link too. I am downloading the utility atm http://www.tombraiderforums.com/images/smilies/smile.gif

Aaron - what? :confused:

laracroft8290
22-06-04, 16:34
Originally posted by Nicky:
Thank you, joseph http://www.tombraiderforums.com/images/smilies/smile.gif That was very helpful! http://www.tombraiderforums.com/images/smilies/thumb.gif Thanks for the link too. I am downloading the utility atm http://www.tombraiderforums.com/images/smilies/smile.gif

Aaron - what? :confused: Excuse my sentence fragments.... http://www.tombraiderforums.com/images/smilies/tongue.gif I think in the next generation of Intel motherboards and processors (LGA775 cpu socket) intel will have software that allows you to monitor the CPU temp...most people who build their own use an external monitor that fits in one of the cd drive bays.

Nicky
22-06-04, 19:12
Oh, I see http://www.tombraiderforums.com/images/smilies/smile.gif Thanks for the clarification http://www.tombraiderforums.com/images/smilies/tongue.gif

laracroft8290
22-06-04, 20:12
Originally posted by Nicky:
Oh, I see http://www.tombraiderforums.com/images/smilies/smile.gif Thanks for the clarification http://www.tombraiderforums.com/images/smilies/tongue.gif Yeah...knock me upside the head a few times...i'll start making sense again http://www.tombraiderforums.com/images/smilies/bash.gif

Joseph
22-06-04, 22:11
http://home.planet.nl/~dekk0819/hammerhead.gif

jjohn
23-06-04, 21:32
Hi NICKY http://www.tombraiderforums.com/images/smilies/wave.gif
Have you managed to get the motherboard monitor working?
I double clicked mbm5370.exe and nothing happens. :confused:

Just download from a different mirror and it works ok- must have been a corrupt exe.

[ 24. June 2004, 04:15: Message edited by: jjohn ]