Mount a P4 IHS on your Dothan!!! Protect the core!

[charlie]

So here it is... thx to a fellow XS member I have a spare P4-IHS from a 1.6 Willamette.

When you first plop it on top of the Dothan core, you see the IHS floats above the pcb maybe 1mm. So I looked at how Intel does it. They put a bead of black silicone (rtv) around the base of the IHS. I believe that Intel uses a press to install the IHS to the core of their P4. After a few hours the press releases the CPU. The thermal paste is well "squished" between the IHS and the core and the IHS adheres to the pcb with the silicone stuff.

So I did the best I could, using a 3 pound brick of copper to be my "press".

Here's the project:
http://www.xtremesystems.org/forums/attachment.php?attachmentid=33871

Here's the bottom of the IHS stuck to the heatsink after testing for contact...BINGO!
http://www.xtremesystems.org/forums/attachment.php?attachmentid=33930

and here's the finished product... I could have taken a qtip and smoothed the silicone so it was "prettier" but I just wanted it "square" and level...
http://www.xtremesystems.org/forums/attachment.php?attachmentid=33931

now I'm just gonna let it cure overnight with the weight still on:
http://www.xtremesystems.org/forums/attachment.php?attachmentid=33933

[illmatik]

Quote:
Originally Posted by charlie
here's the problem... if you make a IHS that fits on core and rests on the pcb, what about the TIN on the core, that takes up a little space, too. RTV is simply black silicone from a hdwe store. I will start a thread of "how-to"!

C

Yeah, thats what I mean, how to machine it to have just enough slack to account for the intel coating and its sloppy drip over. You think a .9mm notch height wise in 2.5mm silver stock should cover it as well as a .1mm around to account for the intel tin would do it. I figure a bead of ceramique around the perimeter should fill in the core notch.. If I make the core notch w/ room to spare over spec measurements and a perfectly flat base that can be coated w/ tim as well to seal from the atmosphere, what kind of condensation risks are there, or should I really be more worry about good core contact this point?

[charlie]

Quote:
Originally Posted by charlie
here's the problem... if you make a IHS that fits on core and rests on the pcb, what about the TIN on the core, that takes up a little space, too. RTV is simply black silicone from a hdwe store. I will start a thread of "how-to"!

C

Yeah, thats what I mean, how to machine it to have just enough slack to account for the intel coating and its sloppy drip over. You think a .9mm notch height wise in 2.5mm silver stock should cover it as well as a .1mm around to account for the intel tin would do it. I figure a bead of ceramique around the perimeter should fill in the core notch.. If I make the core notch w/ room to spare over spec measurements and a perfectly flat base that can be coated w/ tim as well to seal from the atmosphere, what kind of condensation risks are there, or should I really be more worry about good core contact this point?

Yeah, that'd be nice... if it rested on the pcb and had room for a VERY THIN coat of AS5 on top of the core under the IHS. You'll need to mess with different machined parts until you find the one that works the best. Or just get a P4 IHS :stick:

;)

C

[charlie]

will youre stuff hold @ subzero temps? :stick:
anyways nice done..looks smooth :hehe:

Sure, it's just a copy of what Intel does... it SHOULD behave just like a P4 under phase change.

C

[Nasgul]

Are you going to cover the breathing hole? just to make sure no condensation is build inside the heat-spreader?

[illmatik]

Yeah, that'd be nice... if it rested on the pcb and had room for a VERY THIN coat of AS5 on top of the core under the IHS.



BINGO! That exactly what I'm trying to do!! I want the rest of the IHS to be perfectly flat against the core so that theres a single source of pressure on the core rather than using force to attach the IHS to the processor pcb.



You'll need to mess with different machined parts until you find the one that works the best. Or just get a P4 IHS :stick:


Yeah I'm going to start by modding the intel IHSs and a piece of copper cold plate I have that will be split. If I can find a method that can be consistently reproduced, I might as well have a go with silver ;)

[death metal]

Woah........nice pics. Thanks a whole bunch for the tip! Sorry for my OT posts on the Dothan mystery thread. This one is great. And that metal block is scary. If it tips over, I think you can crush the whole set up!!!

Thanks to Nohto as well about clarifying what RTV is :)....keep this discussion and ideas flowing guys...

[ibby]

how does this help overclocking apart from you wont crush the core with this ... :D

[jrw]

How are the pins on the CT-479 doing under that brick?! :)

Nice work, and awsome "trick"! :D

Thank you Mr charlie...

[craig588]

Why didn't you lap the inside and top of it? Tin is not a good conductor.

[Unseen]

i have done the same to my dothan. Nice charlie.

[brandinb]

I have to say the more i watch it the more i like it..yet i'm having a strong feeling to play the sadist :hehe:
Would an FX hsp fit on it?That way i can writ in small same letters owned on it :hrhr:
lol nice
________
Vaporizer (http://twitter.com/vaporizer)

[charlie]

no, A64 IHS are HUGE!!

[charlie]

How are the pins on the CT-479 doing under that brick?! :)

Nice work, and awsome "trick"! :D

Thank you Mr charlie...

I was thinking the SAME thing!!

But I figured that 3 pounds is about 1500 grams... and the ct-479 has 478 pins...
1500/478 = 3.13 Grams pressure per pin.

C

[Raiden Zero]

Are you going to cover the breathing hole? just to make sure no condensation is build inside the heat-spreader?

good question...
answear(s)?^^

@topic: i'll do the same with my 760, too.

[[XC] moddolicous]

Nice idea Charlie. This should allow more people to mount casades and tighten down LN2 tudes down for better heat transfer. Too bad no one did this for AXP. Would have saved people a ton of chips.

[JSU]

So um neone selling p4 heat spreaders? :D

[STEvil]

Why didn't you lap the inside and top of it? Tin is not a good conductor.

would need to mill the base to do so, the base has a step all the way around it. A64's also have this "feature" :rolleyes:

[charlie]

After having a IHS on my Dothan for a week here's what I've noticed:
The cpu idles about 2-3C warmer than without a IHS... but under load it runs 2-3C COOLER than naked... this can only be explained by the fact that it is making better contact now than before when naked. Plus my CPU already has 3 small pits and 4 or 5 hairline fractures on the core, ONE MORE heatsink mount may have been the "end" for my Dothan... this mod is a "lifesaver"

C

[runmc]

Very impressive work Charlie. I'm glad you "Saved the Dothan". (Dolphin) LOL :p:

[Unseen]

take a look my hs.

A friend(eleven) with his cnc did it. :)

http://img115.imageshack.us/img115/5900/11kl1.jpg (http://www.imageshack.us)

http://img115.imageshack.us/img115/5452/24qh1.jpg (http://www.imageshack.us)

The die is 0,82.
The hs is 0,62 so 0,2 difference.

[freecableguy]

Now... that CNC'ed IHS is cool....

[Always]

Awesome work, and copper made, I gues no problems now mounting whatever cooling you want to put on it.

Kudos to eleven for the awesome work.

[charlie]

nice...

[Waus-mod]

Thats a really pretty job charlie.. Did you used Liquid electrical tape to mount the ihs on the dothan's pcb?

[charlie]

Thats a really pretty job charlie.. Did you used Liquid electrical tape to mount the ihs on the dothan's pcb?

no, I used RTV silicone just like INTEL does...

C

[k|ngp|n]

nice work jon :)
and that copper ihs is killer man!, your friend want to make any extras? Could sell quite a few here I bet.

[xxxAgentxxx]

nice work jon :)
and that copper ihs is killer man!, your friend want to make any extras? Could sell quite a few here I bet.

I'll second that^^

[wwwww]

heh nice job...I started using the ihs of a 2.6C since I went to liquid (and noticed the corners of my die were kinda crushed in)...Mine fit fine though, didn't need to do anything fancy to it. I didn't actually mount it on though (on air I prefer without it). I had that black stuff from the p4 still on though.

[Unseen]

i will ask him if he can make some of them.

[xxxAgentxxx]

doit up :cool:

[EvlUndrWareNome]

This looks like a great idea =)

One thing that jumped out at me is, is that wouldn't there be a chance of damaging the cpu under more load on the socket than intended to. Should we still make the holes on the bracket raise higher ?

[DrJay]

Isn't it safe to take the IHS off of any Northwood P4 as long as it is a 'D1' stepping?

[Mr.x3m]

But dont remove hs from 3** celerons.. http://personal.inet.fi/atk/mrx3m/IM000121.JPG

[Shadowmage]

Holy crap, that's pretty cool!

[mtb856]

But dont remove hs from 3** celerons.. http://personal.inet.fi/atk/mrx3m/IM000121.JPG

Hmmm, yes I think that would be a bad thing lol
:p:

[Waus-mod]

wow.. the whole core with it.. no thats not good :stick:

[masterofpuppets]

Haha, can anyone dig up the pic of freecableguy's M0 with no IHS?

[IYP]

yeah intel is starting to solder the cores to the IHS

[masterofpuppets]

No, this pic was from the days when Intel used to stick their IHS to the core with epoxy. They started doing it when 3.2EE's came out, and did to Northwood M0 (rejected EE's) too, and every chip since then.

[Lithan]

After having a IHS on my Dothan for a week here's what I've noticed:
The cpu idles about 2-3C warmer than without a IHS... but under load it runs 2-3C COOLER than naked... this can only be explained by the fact that it is making better contact now than before when naked. Plus my CPU already has 3 small pits and 4 or 5 hairline fractures on the core, ONE MORE heatsink mount may have been the "end" for my Dothan... this mod is a "lifesaver"

C

Yep, that's why I'm doing it to my Dothan the second that sucker arrives. Thanks for the tip.



But dont remove hs from 3** celerons.. http://personal.inet.fi/atk/mrx3m/IM000121.JPG


You can probably just grind that crap out of the Heatspreader. No one will miss it. :P

[tome]

Hi,

What is the best way to remove the IHS from a P4 1,5 w/o damaging it?

tome

[ibby]

Iam guessing, .....
get a razor blade, and cut the plastic rubber,
and it should pop off.

i dont think that the earliar p4s cores were stuck to the heat spreador.

[masterofpuppets]

Is it safe to remove the IHS from a 2.8GHz northwood?

[banias_bao]

and how deal the northwood without IHS?:)

[JamesAvery22]

I'll second that^^


Any extras ever get made? I dont even have a dothan but Id buy one at a good price now just in case I do buy a dothan :D

[tome]

Iam guessing, .....
get a razor blade, and cut the plastic rubber,
and it should pop off.

i dont think that the earliar p4s cores were stuck to the heat spreador.

Good hint. Worked perfectly. Now some amatheurish handy lapping and it should be fine.

tome

[xxxAgentxxx]

Any extras ever get made? I dont even have a dothan but Id buy one at a good price now just in case I do buy a dothan :D

I pm'd him a week back, no response as of yet.

[masterofpuppets]

Would a Celeron 1200 socket 370 IHS be the right dimensions for a Dothan? It looks P4 sized.

[tome]

Well, I mounted a P4 IHS on my P-M 760,

http://mitglied.lycos.de/drtome1/ihsa.jpg

put some artic ceramique on the dye (before) and on the IHS and equipped that with a Zalman 7700Cu (similar to the method described here in the forum).

This combo is running on a P4C800-E dlx with latest bios, 4x 512 MB Corsair 3200C2pro rev. 4.1 (TCCDs ?) and other stuff.

Bios settings:

- multi = 12
- FSB = 230 / 1:1
- vcore = 1,45
- Performance mode: turbo
- PAT = auto
- RAM = 2,5 / 3 / 3 / 7 / 4
- Spectr. = disabled

Idle temp (bios and Asus probe) = 41C
Full load (prime95, after 6 h) = 65-68C

I think that the temps are too high. Can someone advice?

tome

[stealth17]

Well, I mounted a P4 IHS on my P-M 760,

http://mitglied.lycos.de/drtome1/ihsa.jpg

put some artic ceramique on the dye (before) and on the IHS and equipped that with a Zalman 7700Cu (similar to the method described here in the forum).

This combo is running on a P4C800-E dlx with latest bios, 4x 512 MB Corsair 3200C2pro rev. 4.1 (TCCDs ?) and other stuff.

Bios settings:

- multi = 12
- FSB = 230 / 1:1
- vcore = 1,45
- Performance mode: turbo
- PAT = auto
- RAM = 2,5 / 3 / 3 / 7 / 4
- Spectr. = disabled

Idle temp (bios and Asus probe) = 41C
Full load (prime95, after 6 h) = 65-68C

I think that the temps are too high. Can someone advice?

tome


what were they before the ihs mod?

[tome]

Temps before with stock cooling were as follows:

idle 42-44C
load 58-63C

tome

[dfx]

http://i2.photobucket.com/albums/y14/5ubz3r0/DSC01569.jpg
http://i2.photobucket.com/albums/y14/5ubz3r0/DSC01570.jpg
http://i2.photobucket.com/albums/y14/5ubz3r0/DSC01571.jpg
http://i2.photobucket.com/albums/y14/5ubz3r0/DSC01573.jpg

[tome]

@dfx: What are your temp w/ and w/o the IHS?

tome

[dfx]

Got the IHS up since day 1 :D

[patrickgerry]

Got the IHS up since day 1 :D

dfx,
what do you call that tape that you used and where can I get some.

Thanks

[Syndicate]

It's the thin double sided tape, normaly avalible for hardware stores.