Removing the Prescott Heatspreader

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Originally posted by Karnivore
Leave it on.....


If I had to absolutely remove one I would remove it slowly as if lapping it, seems youv'e tried most reasonable possibilities...

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yeah, thats the only way i thougt of as well. you should have access to a lapping machine, no? just put in the cpu upside down and use very rough sand paper. the thickness of the ihs is well documented so you know when you should switch to a thinner grid.

the prescott without ihs you saw was most likely a mobile prescott. they were released some weeks ao and should be available soon. they come without ihs like all mobiles.

IF somebody managed to remove the heatspreader of a prescott or gallatin core then he/she was VERY lucky, and there was probably bad applied thermal epoxy.

the only guy i heard of that took off the heatspreader of a prescott was on vr-zone, and he ripped of the entire cpu of the package. i also heard of a guy who managed to remove the ihs of his m0 chip with gallatin core wich was epoxied... WITHOUT killing it... and the gallatin core is significantly larger than the prescott core... but i think that was just good luck, i wouldnt try to reproduce that.

as i said, lapping seems to be the only safe way.

the pic i have is from vr-zone. and its not actually a pic of the prescott without heatspreader, its a pic of the prescott packaging without heatspreader and without core :D

they ripped off the heatspreader and the core came off with it :D

http://www.vr-zone.com/?i=308&s=1

i think its the same stuff they used on the newer northwood/gallatin cores and on all prescotts. i think they tried it first when people started removing the IHS of their M0 chips and then used it on all chips.

heres the final version btw :)

I have a question for you

those A64 packages there, do they apply for s940/939 cpus as well? does the FX have the same die as the clawhammer? the s939 cpus have the same newcastle die? or do those pics only refer to the s754 chips?

atm every 1Mb chip from amd is clawhammer and all 512kb chips are newcastle, no matter what package.

soon there will be newcastle 512kb L2 chips and oakville(?) 1mb 90nm chips.

i've done this to 4 pentium 4s now. 2 willys, and 2 northwood "c" chips.

I used a box cutter razor blade for three of the four and twine to floss out the compound on another

I haven't tried any prescotts yet. If epoxied, they present a problem.

EDIT: I guess epoxy would give you problems. Perhaps the one you saw was an early production of prescott

welcome to Xtremeystems! :toast:

here fafnir, theres a guy from austria who managed to remove the ihs of his prescott :)

http://www.xtremesystems.org/forums/...threadid=38814

http://www.ocforums.com/showthread.php?t=312344

um?

Ahhhh! It's my first 2.4C m0! Yep, I killed that one good. I think that was the first DIRECT proof that the new m0 steeping were failed Gallatin cores...

Yes, they do look like Gallatin cores, look at the width of them. Note to self: don't remove the heatspreader on ANY m0 stepping processors that I aquire.

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Originally posted by freecableguy
Ahhhh! It's my first 2.4C m0! Yep, I killed that one good. I think that was the first DIRECT proof that the new m0 steeping were failed Gallatin cores...

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no, but it was the first direct proof that the latest m0s were all epoxied to the ihs :)

keep lapping fafnir, will take ya looong, but should be worth it. 4°C temp drop at least :)

what is up with the thread at ocers?

i think i have success here

this is a 3.0c

i used a razor blade and went around the edge of all sides of the HS

through doing this i was clearly breaking the epoxy seal, so i felt somewhat successful, and kept on going.

after all 4 sides were done the HS just kinda popped off.

it appears as if I got lucky and this was bonded by nothing more than some intel issue thermal compound.

i was a bit worried, but i have plans lined up for a 3.4ee, so i wasn't too worried.

all is well now,

my biggest concern is that from going around the HS with the blade, slight scratches have been made in the green outer coating of the chip, and I'm certainly hoping that these scratches did not kill the chip.

How I removed the S775 Heatspreader off the 3 ghz prescott.

I gently cut all edges so that I have some space to play with.

now I force the sharp (stanley knife) knife a bit deeper. You should be scared you will have to put some force on.

Ok now since you have cut all for edges but not the in between bits you should make your way slowely from one edge to another.
After completing that leave the CPU for 1-2 mintes ( mental pause ).
Now get some zahn seide?? ( string you use to clean the in between bits from your teeth )
And try to pull it through the HS. It will most likely break where the core is. Now you know the HS is completly sticking on the core.
Now get a very thin screwdriver used to turn VR's and other things and wrap a thin layer of toilet paper on the tip of it.
Now carefully put the screwdriver on one edge where you cut.
DO NOT TRY TO LEVER. Because you feel a great amount of force.
Now leave it for 5 minutes. Air will go underneath the heatspreader.
Now do the same for all four edges.
After this is done you can try to lift of the HS by a little force. Try doing it bit by bit otherwise you will most likely rip the core off.
I had some Silver epoxy or so on my prescott and the core didnt go off so its possible.
Its just a feeling where you know stop using force and leave it for a couple of minutes and try again.

Try each side of the cpu do not try to pop it off just from one side. You can also try using two thin screw drivers, insert them below the HS at opposite sides and slowly use force.

I hope it helped some of you guys, you must know these things dont like force so best thing is you just concentrate yourself and do everything slowly.

EmineM - pics please.

fafnir posted the pic a couple of posts above but here it is again

as this is what we're looking for, the seperation of the epoxy (marked in red) and not the seperation of the die, as you can see from freecableguy's first M0

http://www.xtremesystems.org/forums/...threadid=39084

heres the new thread :)