Some Kind Of Mobo Or Chip Heat Problem

[joka]

OK,

I bought a budget Biostar mobo and a Pentium D 820 chip in Malaysia. The setup worked fine for a few days, then I got tired of the fan spinning at 4000 rpm and making all that noise, so I went into the BIOS and changed a few things. Basically, I changed the fan control, from full on to "smart". This reduced the rpm's from around 4000 to around 2000. The CPU temp rose from around the mid to high 30's © to 40ish.

The problem is that now the computer won't restart without a little help. You have to turn the power supply off, wait a couple seconds, and then hold the power button in for a few seconds. It took me a day or so to figure this out. But, if I have a house fan blowing into the case with the side panel off, most of the time (<90%) it will restart with no problem. So I think there is a problem with the heat sensor.

Just thought I would let you know, I also dropped the cpu on the ground from a couple of feet up. I was opening the new box, checking out the fan, opened the plastic bubble to get at the fan, and didn't notice the cpu was in a little niche on the "outside" of the plastic bubble. So, when I opened the package, the cpu popped out and fell on the ground. oops.

[kayo]

why not, instead of playing around with the fan speed yourself, (and in this case locking them at a unsuitable speed, try this>

http://www.almico.com/speedfan.php

I've been using it for about 5 months now (a tip from someone on these boards) and it works a treat.

Edited March 29, 2007 by kayo

[Guest Reimar]

The Intel CPU's quite heat sensitive and easy to burn (in the past) and Intel was changing something in the archtecture of the CPU so the will low down and suddenly cut off if the temp goes to high.

A fan with 4000 rpm didn't make much noise but if that is to much for you, change the fan. The best replacement you'll find is a fan from the Zalman series, not very cheap but very effective!

That the CPU was dropping down, should be not a problem as long as not one or more of the "feets" is brocken.

EDIT:

Not play with the original fan and the speed of this fan to lower them. Intel, AMD as well, done for sure a lot testings what kind of Fan the CPU need and even on which speed they should run! Us as replacement only a fan wich gives you better results than the original Fan which came with the CPU!

Edited March 29, 2007 by Reimar

[h90]

it may also happen that the fan does not sit perfect on the cpu. I don't know but I got told that it than possible that an small area of the cpu is hotter than other areas and you get a wrong measure.

not sure if it is true but it sounds like it makes sense

[Stef]

OK,

I bought a budget Biostar mobo and a Pentium D 820 chip in Malaysia. The setup worked fine for a few days, then I got tired of the fan spinning at 4000 rpm and making all that noise, so I went into the BIOS and changed a few things. Basically, I changed the fan control, from full on to "smart". This reduced the rpm's from around 4000 to around 2000. The CPU temp rose from around the mid to high 30's © to 40ish.

The problem is that now the computer won't restart without a little help. You have to turn the power supply off, wait a couple seconds, and then hold the power button in for a few seconds. It took me a day or so to figure this out. But, if I have a house fan blowing into the case with the side panel off, most of the time (<90%) it will restart with no problem. So I think there is a problem with the heat sensor.

Just thought I would let you know, I also dropped the cpu on the ground from a couple of feet up. I was opening the new box, checking out the fan, opened the plastic bubble to get at the fan, and didn't notice the cpu was in a little niche on the "outside" of the plastic bubble. So, when I opened the package, the cpu popped out and fell on the ground. oops.

My D820 runs at 50-60 degrees without any problem. I wonder whether you applied the thermal paste properly when you installed the heatsink on your CPU. If not done correctly, actual temperature would be much higher than measured by the sensor.

I was bored of the noise of Intel retail heatsink/fan and changed to a better quality product. My computer is now completely silent.

Speedfan is a good free software but it isn't easy to set for a beginner.

[penguin]

The CPU temp rose from around the mid to high 30's © to 40ish.

40ish is hardly a high temperature, it's rated to 65c. If it was changing the BIOS that was the start of your problem then reset the BIOS to default. I have a Zalman cpu heatsink fan and if l set it below 1400rpm for silent running when you push the start button it hesitates for a few seconds at start up, but when you increase the speed it starts up as normal.

A fan with 4000 rpm didn't make much noise

I have a Vantec Tornado l tried using once, 5700 rpm... you can hear it in the next moo ban if you don't use a fan controller.

[joka]

The shop didn't use any thermal paste. Is it really necessary, I have read conflicting reports.

[penguin]

The shop didn't use any thermal paste. Is it really necessary, I have read conflicting reports.

:D

sorry, but l've always wanted to use that emoticon.

It's kinda hard to believe they didn't use any thermal paste. If they really didn't then yes, you need to apply some. Not sure where you would have read conflicting reports about using it, l would have thought using thermal paste was one thing everyone would agree on.

Or did they use a thermal pad instead of paste, is that what you mean?

Edited March 29, 2007 by penguin

[solent01]

The shop didn't use any thermal paste. Is it really necessary, I have read conflicting reports.

:D

sorry, but l've always wanted to use that emoticon.

It's kinda hard to believe they didn't use any thermal paste. If they really didn't then yes, you need to apply some. Not sure where you would have read conflicting reports about using it, l would have thought using thermal paste was one thing everyone would agree on.

Or did they use a thermal pad instead of paste, is that what you mean?

I understand you ROFL and your question still stands, myself I much prefer paste, back home I used to clean my system every 6 months, here with all the dust in the air I clean every 3 months, that includes new paste, I have an overclocked P4 2.6 thats still running happy at 3.2, the only thing that lets my system down is the steam driven graphics card Back to the original post, you have a problem with cooling, nothing more, if noise is the problem then change your fans, by the way you should be running 2 case fans here, 1 for inlet, the other for outlet, apart from good heat sink, and if your running a powerful graphics card, that will need good air flow also, make sure its onboard fan has good air getting to it, tuck the ribbons out of the way, or buy yourself some proper mod ribbons, or you could always go for the best, go water cooled

[joka]

If he used a thermal pad I didn't see it. Is the pad integrated with the fan?

[Stef]

If he used a thermal pad I didn't see it. Is the pad integrated with the fan?

Check your case temperature. The CPU temperature should be about 5-10 degrees higher than the case temperature. If it's lower, the CPU temperature sensor is the culprit.

Thermal paste or pad is definitely needed. If you don't use, your CPU will automatically run slower to pervent damage or your computer will unexpectedly shut down when too hot.

[penguin]

Joka, some sort of thermal paste/pad might have come pre-applied to the bottom of the heatsink. What is the room temperature where you have your computer? If it's an non airconditioned room in Thailand then there is nothing wrong with 40c (at idle). I think even the cheapest shop would at least use some thermal paste. While brands such as Arctic Silver are expensive, you can buy a cheap tube of paste for 20 baht so it's hard to believe a shop would skimp on this as it would probably mean they would have customers coming back complaining about their computers overheating, especially in a hot country like Thailand.

Try downloading "speedfan" or "core temp" and see what temperatures they report.

Other possibility could be the power supply. How many watts? A cheap Chinese unit might not deliver as much power as it should. Take a look here to get an idea if yours is up to the job.

[h90]

Joka, some sort of thermal paste/pad might have come pre-applied to the bottom of the heatsink. What is the room temperature where you have your computer? If it's an non airconditioned room in Thailand then there is nothing wrong with 40c (at idle). I think even the cheapest shop would at least use some thermal paste. While brands such as Arctic Silver are expensive, you can buy a cheap tube of paste for 20 baht so it's hard to believe a shop would skimp on this as it would probably mean they would have customers coming back complaining about their computers overheating, especially in a hot country like Thailand.

Try downloading "speedfan" or "core temp" and see what temperatures they report.

Other possibility could be the power supply. How many watts? A cheap Chinese unit might not deliver as much power as it should. Take a look here to get an idea if yours is up to the job.

well last time I had a computer problem the shop also removed the heat sink and tested a different cpu, as it was something else the put my cpu and heat sink in again. they were for ages together and the thermal paste was hard as rubber. The neither removed it not put a new one.

so possible a shop does not use any....