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help! CPU close to being toasted...?

llama_thumper

llama_thumper

llama_thumper

Associate
Joined
10 Jan 2005
Posts
18
hi guys,

was wondering if anybody could give me some hints on this. to make it brief, i got myself a Pentium D 805. I installed it with the stock heatsink/fan. Not realising what I was getting into :), I took it off again. Needless to say, this disformed the thermal pad. I attached the heatsink/fan again, and during one of my BIOS inspections, noticed that it had 75C. Shut down the PC, and applied thermal paste (after cleaning the CPU and heatsink):

http://redo.net/temp/public/CIMG5102.JPG
http://redo.net/temp/public/CIMG5110.JPG

I did not apply any paste to the heatsink, it was very sticky when I tried (so I cleaned it again).

After putting on the heatsink/fan again, I got 95C in my BIOS - what am I doing wrong? Is the thermal paste applied correctly (Arctic Silver 5, it's a bit sticky)? Did I use enough/too much (2 grains of rice)?

Would appreciate any hints, before I toast my CPU, if I haven't done so already.... :(
 
Did you clean all of the thermal pad off of the cpu and heatsink before you put on the as5? Use 1 grain of rice on the cpu and then just put the heatsink on top, sounds like bad contact or too much thermal paste
 
llama_thumper said:
yup, did clean both... bad contact you say? guess i can try pressing down the HSF even more, though i'm pretty sure it's all clicked in... it's the stock intel HSF.
Click to expand...

Arctic Silver's website has explicit usage instructions. Assuming you have followed these to the letter you shouldnt have any issues...

SiriusB
 
My technique:

1. clean both HS and IHS with alcohol based solvent.
2. Put a dab on both IHS and heatsink base.
3. get a plastic "baggie" and turn it inside out..
4. use your finger THROUGH the baggie to smooth out the HS and IHS coatings. You want the SMALLEST amount possible that still covers the entire HS (as in no shiny-ness visable)
5. Attach the HS and fan header..
6. Try it now :)
 
are you guys sure about that 1 grain of rice/dab for my type of processor? (as on the pix, pentium d 805... more than 2cm by 2cm)

should the AS be sticky? (it was in a closed tube, but I did use it before, a couple of months ago).
 
Last edited:
Arctic Silver say a grain of rice amount. They make the bloody stuff so I reckon they know what they're on about :D

Just follow their instructions and seriously you cant go wrong.

SiriusB
 
right, will try then... and how can i find out whether i've managed to fry it? :) no screen at all, or some error message? want to know when i have to check my bank account balance :D
 
If your CPU is stuffed you may or may not get some motherboard bleep - check the manual for what the bleeps mean. PC shouldnt even post if your CPU is a duffer too. Absolute best way of telling is to try it in another rig.

SiriusB
 
senorstealth said:
My technique:

1. clean both HS and IHS with alcohol based solvent.
2. Put a dab on both IHS and heatsink base.
3. get a plastic "baggie" and turn it inside out..
4. use your finger THROUGH the baggie to smooth out the HS and IHS coatings. You want the SMALLEST amount possible that still covers the entire HS (as in no shiny-ness visable)
5. Attach the HS and fan header..
6. Try it now :)
Click to expand...

Seems like a pretty decent method... I'd try this.
 
senorstealth said:
My technique:

1. clean both HS and IHS with alcohol based solvent.
2. Put a dab on both IHS and heatsink base.
3. get a plastic "baggie" and turn it inside out..
4. use your finger THROUGH the baggie to smooth out the HS and IHS coatings. You want the SMALLEST amount possible that still covers the entire HS (as in no shiny-ness visable)
5. Attach the HS and fan header..
6. Try it now :)
Click to expand...

I'm doing it the same way, except that I'm only applying on the IHS/core... Not sure what's best to do? :confused:
 
You don't actually need to cover the entire IHS with thermal compound from corner to corner. Arctic Silver instructions say only to put a grain of rice worth or so in the middle because the HSF pressure will spread it out. It won't spread all over the IHS, just a largish circular area in the middle of the cpu, but that doesn't matter because the core underneath is right under this in the middle, and it's more important to have contact directly above the core.
 
llama_thumper said:
right, will try then... and how can i find out whether i've managed to fry it? :) no screen at all, or some error message? want to know when i have to check my bank account balance :D
Click to expand...
You can't do that anymore, i.e. fry a (modern day) CPU & good luck trying :D If throttling down does not help save it, the processor/system will simply shut down. With that, 95°C :confused: - should have shut-down or something?! Unless faulty mobo reading?

But if its working at a high tempreature, maybe near/around the max spec by Intel, then that processor will live a shorter life.
 
sablabra said:
I'm doing it the same way, except that I'm only applying on the IHS/core... Not sure what's best to do? :confused:
Click to expand...
People forget/don't know that:
Wikipedia said:
Thermal grease's primary purpose in electronics is to mediate small surface imperfections between an integrated circuit (also known as a chip) and a heatsink. When applied in appropriate quantities, it fills the tiny pits and grooves — particularly on today's CPUs — thereby increasing the amount of surface-to-surface contact with the CPU die.
Click to expand...
Arctic Silver Instructions
 
All this talk of thermal compound is irrelevant, if your chips running at 95 degrees its because of only two reasons.

Chip is not seated correctly.

Sensor is wrong.
 
thanks for the earlier advice - i pressed down the HSF even more and got down the temp to 65C and then, after pressing even more, to 55C. Now it runs 15C hotter than my identical twin system, which had a thermal pad which I did not mess about with.

so, basically, there was lacking contact, and there still is - the intel HSF is not that great, it clips on but isn't apparently completely 'in touch'.

thanks again for the help - might be back with more questions though, ie "how much pressure do i have to apply to the HSF before it cracks the CPU casing/motherboard? ":)
 
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