P3 SC242 450 Fan speed

[wolfmann1]

My friend and I both have the exact same processor. His fan runs at about 5000rpm, and mine at about 4000rpm...does anyone know the spec that the P3 OEM heatsink/fans are suppose to run at?

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[tjaymadison]

Many factors involved here. Same mobo? Same BIOS and version?

Same hardware monitor/report program? Same power management/ACPI/APM settings?

If so, I'd check the web site of the HS/F manufacturer or vendor for the specs.

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"I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
-- Charles Babbage, mathematician, computer pioneer, analytical engine designer (1791-1871)

[Randy_tx]

The fan rpm's are not as important as the cpu temp. Your motherboard BIOS probably has a tab for "PC Health" or something like that which will tell you the cpu temp. Some fans can do a great job at lower rpm's than others..ie blade design etc.

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Will XP save Me ?

[mjc]

Another big thing on fan speed is the manufacturer of the fans, even if you have two computer that followed each other down the assembly line there is no guarantee that the CPU fans will be the same, then like Randy said if the temps are OK then speed doesn't really matter, but like tjay said if the speed is not with in the range it is supposed to be then, if it is still under warranty, get it replaced...

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mjc
Links list:Computer Links (http://www.fortunecity.com/skyscraper/highrise/11/index.htm)

All Control Agents must memorize Rule 5 before proceding to Rule 6

[wolfmann1]

Both of our HSF's are OEM versions, which are permanently attached (or relatively...meaning if we remove the plastic ties, the HSF can't go back on) and came from Intel. Single fan, enclosed heatsink version. The fans MAY be different, but I doubt it...the HSF's look EXACTLY the same, only his spins about 1000rpm faster.

I just wanted to know if there was a specification for Intel OEM packaged HSF's. That's all. But thanks for your input. But I'll explain the reason why I wanted the know the specification.

Like I was saying we have the EXACT same processor. Same heatsink/fan, same revision, probably even stepped off the line together. Both were bought at the same time, also, from the same vendor...I've since had a motherboard replacement, however.

We are both using Motherboard Monitor 5.05, and he has Tekram sensors and probes, and I have Winbond. Our bios and revision are not going to have any sort of bearing. ACPI may have some bearing, but we both use Windows 2000 SP1, dual boot with Win98 SE, and we even have the same 300 watt power supplies.

Assuming the sensors are accurate, which there is no reason to think they are not, they should operate within a certain design parameter. We both use CompuNurse's to verify the readings we're getting. One at the CPU fan inlet, and one over the PCI slots.

My CPU temperature appears to be fine. Under load, regardless of the system temperature, it never exceeds 43 degrees celsius while under load...sometimes it hits 45, but very rarely. It idles at or close to system temperature.

I have a pretty aggressive case cooling solution (two 80mm, 43cfm Sunon exhaust fans on roof directly above cpu, one 31cfm Sunon blow hole over PCI, and one monster 120mm 108cfm intake fan at front...controlled with variable speed Bay Bus from www.pcmods.com). (http://www.pcmods.com).) My system temperature with all fans going full tilt boogie is within 0.5-1.7 degrees C of room temperature, about 22 degrees C. Cpu idles at or near system temperature.

His system temperature is about 29-31 degrees C, and his CPU runs at 43 degrees, idle, in Win2000, and 48 degrees idle in Win98. When his CPU is under load it rises to 55 degrees, and one day peaked at 73 degrees C while we were playing Starcraft on a LAN for about 3 hours. Needless to say we shut it down for ten minutes, went back and it was still hovering around 50-55 degrees C.

I know what his problem is, but its just odd that his fan is still spinning 1000rpm faster than mine, and he has a cooling problem. With the EXACT same heatsink and fan. Mine never exceeds 45 degrees, maybe rarely 50...his consistents peaks at past 50 degrees while under load.

He has none (just stock power supply sucking the air out). Even with my fans shut off, my CPU never rises above 12-15 degrees above ambient while under load, and consistently will cool down to within 1-3 degrees ambient system temperature, mind you the ambient system temperature is about 7-10 degrees above room temperature, but my CPU temperature doesn't scale, while under load. It could be 18 degrees C inside the case room or 30 degrees C, and the CPU never exceeds 45 degrees. The only time it did exceed 50 degrees was running a looping time demo of Quake III Quaver demo, with no fans running and the ambient system temperature was about 35 degrees C.

I'm just trouble shooting his system right now, and working on setting up a good cooling solution for him, which will be different than mine (all my fan mounts were custom mounts) and he has two fan mountings he can play with.

This is really odd, considering that his fan is faster, and technically pushing more air across the heatsink than mine is...yet I don't have a problem.

I have a Slot 1 GOrb that I'm going to install on my P3, as soon as I figure out how to take the HSF off without ****ing things up. And Duncan is going to look at getting either a new HSF or a replacement because his isn't operating efficiently.

Could be just the breakdown or improper installation of the thermal pad. His CPU has always run hot, but not this hot.



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[mjc]

hmm.....I'd say that there may be something with the pad theory. But 4000 rpm to 6000 rpm is the range I've seen for most HSFs.

Is it any noisier thatn yours?



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mjc
Links list:Computer Links (http://www.fortunecity.com/skyscraper/highrise/11/index.htm)

All Control Agents must memorize Rule 5 before proceding to Rule 6

[Reid]

Although I don't think they are common for CPU heatsinks, there are speed-controlled fans with built-in temperature sensors. Here is one at AnandTech (http://www.anandtech.com/showdoc.html?i=1279&p=11).

If you have speed controllers, his could be running faster since something is causing the CPU to be hotter than yours.

Have you tried checking the fan speeds just after starting up the systems (cold)?

Just thought I'd throw this in to confuse the issue http://www.PCGuide.com/ubb/smile.gif

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reido@my-deja.com

Friends don't let friends install Windows ME



[This message has been edited by Reid (edited 05-11-2001).]

[Rick]

"We are both using Motherboard Monitor 5.05, and he has Tekram sensors and probes, and I have Winbond. Our bios and revision are not going to have any sort of bearing. "

The Mother replacement and the Bios have a lot to do with it.

The fan speed is controlled by the M/B voltage .
The sensors used are different and controlled by the bios.

Using the same fan in two systems can and will give different readings and speeds.
The deta fan on my A7V runs faster than the deta on my Iwill KK266
Same fan different M/B and bios

Your safest and best source for a true reading is in the Bios (PC health / system monitor )

BTW.
The P3 retail package fan on my Asus P3V4X is running at 4891 rpms.(per MBM5)
5041 rpms (per Sandra)

5038 Per the Bios health monitor.

[Rick]

Why is your friends system running hot?

I'd first look at air flow.
Then amount of air ( extra fans needed ? )
Then what heat sink paste was used and how much.

[wolfmann1]

Thanks MJC...you answered my question.

Both of ours came stock from the intel factory, attached, permanently, probably with whatever thermal pad Intel provides. Or in the least my OEM installed it, and it comes with permanent (IE no clips, and I can't take it off without cutting the plastic permanently) Intel loves thermal pads for some reason, probably ease of installation.

I've ruled that my temperature sensors in my bios aren't always accurate. And my RPM indication is the same as what is indicated in Motherboard Monitor 5.05. Its not he monitoring programs I use that are the problem, its the fact that I think his CPU is cooking when it shouldn't be.

I know exactly what his problem it, and how to fix it.

Thanks for all you input! That's what makes this forum great.

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