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DFastLane · 04-28-2000, 01:24 PM

I'm trying to breathe new life into some clunker pc's at work by putting in some epox mvp3c2 boards and amd k6-2 475 processors. I put the first one together and it posted fine but the processor heats up within minutes and the alarm goes off. Core voltage is set for 2.4v - like it says on the processor. Bus speed is at 95 with a multiplier of 5x for the 475 cpu clock speed. Those numbers check out in the BIOS settings. The temp alarm is set for 140. I've never had one overheat, so I'm wondering what I should be looking for as the problem.

hackercarlos · 04-28-2000, 01:32 PM

Hi Dfastlane (cool name). We need more info. Does the alarm go off when using some programs or after a certain time in Windows will operation of the PC is idle. Does the processor have a heatsink w/ fan, heatsink alone or none at all on it ?

DFastLane · 04-28-2000, 02:25 PM

I haven't gotten the chance to install anything yet - It heated up before I could even get that far. It has an adequate fan and heatsink. It won't be overclocked, so it should be fine. The processor is just heating up like a toaster oven right now. I'm going to go recheck the settings again to make sure they're ok...

hackercarlos · 04-28-2000, 02:28 PM

Please do so !!

DFastLane · 04-28-2000, 02:58 PM

The settings were fine. I'll try another cpu and see what happens....

Lane

archie · 04-28-2000, 04:01 PM

http://www.pcmech.com/ubb/Forum2/HTML/001256.html ... similar story.

DFastLane · 04-28-2000, 06:26 PM

I popped in a 2.2v 450 and it runs a little cooler - about 51c. I probably need a better quality fan and heatsink rather than the feebie one that came with the cpu for the 2.4v 475. I didn't know it would heat up like that.

-Lane-

PaulDouglas · 05-05-2000, 09:26 AM

It may be a silly question but did you put any heat sink compound between the CPU and Heatsink. If you didn't you will get hot spots!!

Regards

Paul

archie · 05-06-2000, 07:04 PM

Heat sink compound, would that make a difference? [no questions are silly, right]

I have never tried it.

rensab · 05-08-2000, 04:45 AM

Yes I believe the material provides a link between the two surfaces of the heat sink and the CPU top so instead of just a small gap of air, the compound makes for better heat transfer. Conduction heat transfer is always better than convection or radiation at low temperatures.

BTW, where can we get these compound?

wedor · 05-08-2000, 05:20 AM

Try Radio Shack.

hackercarlos · 05-08-2000, 12:05 PM

You are right rensab. And Radio Shack has the HeatSink compound because I've used it and it works fine.

quote:
Originally posted by rensab:
Yes I believe the material provides a link between the two surfaces of the heat sink and the CPU top so instead of just a small gap of air, the compound makes for better heat transfer. Conduction heat transfer is always better than convection or radiation at low temperatures.

BTW, where can we get these compound?

------------------
For breakfast I fry my eggs on an overclocked pentium.

PaulDouglas · 05-10-2000, 07:16 PM

To answer your question. Would heatsink compound make a difference ? checkout the article at http://www.isjm.com/tst/heatsink/compound.htm
it explains everything.

Regards

Paul

[This message has been edited by PaulDouglas (edited 05-11-2000).]

archie · 05-12-2000, 01:51 PM

Thanks for the link and the location where this can be purchased. I picked up 6.5 grams of heatsink compound from Radio Shack [stock #276-1372] and will give it a try 1st on AMD K6-2/500 that is reading 109°F after cooling software is installed and report my findings.

archie · 05-22-2000, 05:49 PM

I am no longer concerned about the temperature of my CPU (109°F, Asus software is cooling it) but nonetheless tried the heatsink compound out of curiousity about ten days ago. A paper thin layer was applied using a 'flat spatula' (plastic tie for closing breadbag). My observation was that there is no diffence in the temperature.

archie · 05-25-2000, 02:07 PM

Correction ...
I did forget to mention that the thermal pad on the heatsink was removed before applying the compound. It does appear that there is a difference after all. From previous readings of 109 to 105°F fairly consistently. That would be close to a 5% drop in temp. Of course, results may vary.

***glc*** · 05-27-2000, 08:22 PM

It might even get cooler if you put enough heatsink paste on it to ooze out when you clamp the fan down.

Carl Price · 05-28-2000, 07:27 PM

You only need enough to take out all the air gaps and (to a point)the less you use the better off you are. More should not be necessary!

------------------
Carl

I tell my son that grades are a reflection of his attitude on life. If he is willing to accept mediocrity in grades then he will be willing to accept mediocrity the rest of his life.
http://www.alladvantage.com/go.asp?refid=eta239

archie · 05-29-2000, 01:33 AM

The layer is probably way too thin. I think you're right and will give it a try next time the case is opened ... which should be soon.

***glc*** · 05-29-2000, 09:04 PM

Very true, Carl, but too little is worse than too much and you can always wipe up the excess that squirts out around the edges. The stuff isn't *that* expensive .

WJWheels · 05-30-2000, 06:02 AM

Here's the way I do it - http://home.carolina.rr.com/poit/tc.html - Hmmm, he says half the volume of a "P". Is that a regular "P" or a beer "P"?

***glc*** · 06-03-2000, 11:16 AM

hmm...if you are gonna use the volume of a beer "P" you might as well just spray a can of foam insulation into your case

I use the Radio Shack pen that guy has pictured and like it a lot. I let it dry for about 15 minutes before mounting the heatsink so the stuff thickens.

05-08-2000, 12:05 PM	#12
hackercarlos Mr. Grins Join Date: Aug 1999 Location: Virgin Islands Posts: 1,961	You are right rensab. And Radio Shack has the HeatSink compound because I've used it and it works fine. quote: Originally posted by rensab: Yes I believe the material provides a link between the two surfaces of the heat sink and the CPU top so instead of just a small gap of air, the compound makes for better heat transfer. Conduction heat transfer is always better than convection or radiation at low temperatures. BTW, where can we get these compound? ------------------ For breakfast I fry my eggs on an overclocked pentium.

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04-28-2000, 01:24 PM	#1
DFastLane Member (9 bit) Join Date: May 1999 Location: TX Posts: 341	I'm trying to breathe new life into some clunker pc's at work by putting in some epox mvp3c2 boards and amd k6-2 475 processors. I put the first one together and it posted fine but the processor heats up within minutes and the alarm goes off. Core voltage is set for 2.4v - like it says on the processor. Bus speed is at 95 with a multiplier of 5x for the 475 cpu clock speed. Those numbers check out in the BIOS settings. The temp alarm is set for 140. I've never had one overheat, so I'm wondering what I should be looking for as the problem.

04-28-2000, 01:32 PM	#2
hackercarlos Mr. Grins Join Date: Aug 1999 Location: Virgin Islands Posts: 1,961	Hi Dfastlane (cool name). We need more info. Does the alarm go off when using some programs or after a certain time in Windows will operation of the PC is idle. Does the processor have a heatsink w/ fan, heatsink alone or none at all on it ?

04-28-2000, 02:25 PM	#3
DFastLane Member (9 bit) Join Date: May 1999 Location: TX Posts: 341	I haven't gotten the chance to install anything yet - It heated up before I could even get that far. It has an adequate fan and heatsink. It won't be overclocked, so it should be fine. The processor is just heating up like a toaster oven right now. I'm going to go recheck the settings again to make sure they're ok...

04-28-2000, 02:28 PM	#4
hackercarlos Mr. Grins Join Date: Aug 1999 Location: Virgin Islands Posts: 1,961	Please do so !!

04-28-2000, 02:58 PM	#5
DFastLane Member (9 bit) Join Date: May 1999 Location: TX Posts: 341	The settings were fine. I'll try another cpu and see what happens.... Lane

04-28-2000, 04:01 PM	#6
archie Member Join Date: Mar 1999 Location: Ontario, Canada Posts: 3,392	http://www.pcmech.com/ubb/Forum2/HTML/001256.html ... similar story.

04-28-2000, 06:26 PM	#7
DFastLane Member (9 bit) Join Date: May 1999 Location: TX Posts: 341	I popped in a 2.2v 450 and it runs a little cooler - about 51c. I probably need a better quality fan and heatsink rather than the feebie one that came with the cpu for the 2.4v 475. I didn't know it would heat up like that. -Lane-

05-05-2000, 09:26 AM	#8
PaulDouglas Member (2 bit) Join Date: May 2000 Location: Ware,Hertfordshire,England Posts: 2	It may be a silly question but did you put any heat sink compound between the CPU and Heatsink. If you didn't you will get hot spots!! Regards Paul

05-06-2000, 07:04 PM	#9
archie Member Join Date: Mar 1999 Location: Ontario, Canada Posts: 3,392	Heat sink compound, would that make a difference? [no questions are silly, right] I have never tried it.

05-08-2000, 04:45 AM	#10
rensab Member (5 bit) Join Date: Aug 1999 Posts: 24	Yes I believe the material provides a link between the two surfaces of the heat sink and the CPU top so instead of just a small gap of air, the compound makes for better heat transfer. Conduction heat transfer is always better than convection or radiation at low temperatures. BTW, where can we get these compound?

05-08-2000, 05:20 AM	#11
wedor Member (11 bit) Join Date: Mar 1999 Posts: 1,801	Try Radio Shack.

05-10-2000, 07:16 PM	#13
PaulDouglas Member (2 bit) Join Date: May 2000 Location: Ware,Hertfordshire,England Posts: 2	To answer your question. Would heatsink compound make a difference ? checkout the article at http://www.isjm.com/tst/heatsink/compound.htm it explains everything. Regards Paul [This message has been edited by PaulDouglas (edited 05-11-2000).]

05-12-2000, 01:51 PM	#14
archie Member Join Date: Mar 1999 Location: Ontario, Canada Posts: 3,392	Thanks for the link and the location where this can be purchased. I picked up 6.5 grams of heatsink compound from Radio Shack [stock #276-1372] and will give it a try 1st on AMD K6-2/500 that is reading 109°F after cooling software is installed and report my findings.

05-22-2000, 05:49 PM	#15
archie Member Join Date: Mar 1999 Location: Ontario, Canada Posts: 3,392	I am no longer concerned about the temperature of my CPU (109°F, Asus software is cooling it) but nonetheless tried the heatsink compound out of curiousity about ten days ago. A paper thin layer was applied using a 'flat spatula' (plastic tie for closing breadbag). My observation was that there is no diffence in the temperature.

05-25-2000, 02:07 PM	#16
archie Member Join Date: Mar 1999 Location: Ontario, Canada Posts: 3,392	Correction ... I did forget to mention that the thermal pad on the heatsink was removed before applying the compound. It does appear that there is a difference after all. From previous readings of 109 to 105°F fairly consistently. That would be close to a 5% drop in temp. Of course, results may vary.

05-27-2000, 08:22 PM	#17
*glc* Forum Administrator Staff Premium Member Join Date: May 2000 Location: Joplin MO Posts: 41,159	It might even get cooler if you put enough heatsink paste on it to ooze out when you clamp the fan down.

05-28-2000, 07:27 PM	#18
Carl Price Member (11 bit) Join Date: Jun 1999 Location: Memphis, Tn Posts: 1,828	You only need enough to take out all the air gaps and (to a point)the less you use the better off you are. More should not be necessary! ------------------ Carl I tell my son that grades are a reflection of his attitude on life. If he is willing to accept mediocrity in grades then he will be willing to accept mediocrity the rest of his life. http://www.alladvantage.com/go.asp?refid=eta239

05-29-2000, 01:33 AM	#19
archie Member Join Date: Mar 1999 Location: Ontario, Canada Posts: 3,392	The layer is probably way too thin. I think you're right and will give it a try next time the case is opened ... which should be soon.

05-29-2000, 09:04 PM	#20
*glc* Forum Administrator Staff Premium Member Join Date: May 2000 Location: Joplin MO Posts: 41,159	Very true, Carl, but too little is worse than too much and you can always wipe up the excess that squirts out around the edges. The stuff isn't that expensive .

05-30-2000, 06:02 AM	#21
WJWheels The Wheeler Dealer Join Date: Sep 1999 Location: Paradise Posts: 2,796	Here's the way I do it - http://home.carolina.rr.com/poit/tc.html - Hmmm, he says half the volume of a "P". Is that a regular "P" or a beer "P"?

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06-03-2000, 11:16 AM	#22
*glc* Forum Administrator Staff Premium Member Join Date: May 2000 Location: Joplin MO Posts: 41,159	hmm...if you are gonna use the volume of a beer "P" you might as well just spray a can of foam insulation into your case I use the Radio Shack pen that guy has pictured and like it a lot. I let it dry for about 15 minutes before mounting the heatsink so the stuff thickens.