need thick thermal pad

[rajah99]

i opened up my dell vostro and replaced the cpu thermal pad with arctic silver paste. The big heatsink over the cpu extends to the northbridge chip. The original pad on that was quite thick, and stupidly i cleaned it off and placed arctic silver on there too. I think theres a few mm gap over the northbridge chip now.

http://img227.imageshack.us/my...?image=heatsinkxh7.jpg

The chipset temps are around 45-47 where they used to be around 40.

Either I could place more artic silver over the northbridge chip, to fill the gap. Or I would need a 2-3 mm pad from somewhere.

Which course of action, and does anyone know where to buy such a pad?

Ive seen a link to this, but not sure its suitable for this purpose?
http://www.rapidonline.com/pro...+filler&moduleno=68127

 

[aigomorla]

http://www.koolance.com/water-...nfo.php?product_id=580

how thick of a pad we talking about?

2-3mm is too thick to be any kind of pad. :X

 

[Quiksilver]

Sure that wasn't thermal epoxy?

 

[Gillbot]

2-3mm is too thick though Dupont makes pads to fill a gap that large. You'd be better off getting a "shim" of copper to put in there or bending the cooler to fit better.

 

[Cheezeit]

I've seen the same thing in my old dell laptop, removed a really thick pad thinking it was terrible and put in arctic silver. It was over the VGA chip, and the AS5 didn't help cooling any. I'm guessing there is a gap and I'll need to find something to put in there.

 

[rajah99]

Hi
Well perhaps a 1mm. You can see from the picture, which is a little blurred. But the pad is not a thin micrometre strip. Its definitely got some thickness to it. I did read on the arctic silver website that they recommend putting on a very thin layer for heatsinks that are flush, but it can be much thicker for heatsinks that dont touch?

This is the northbridge chip, not the cpu that im looking to cover. Does it get AS hot as the CPU can? Perhaps just a thick layer of arctic silver would be enough to keep it from getting too hot?

Gillbot, i would be worried about placing copper between the heatsink and the northbridge chip. If I didnt get the thickness absolutely perfect I might push down and damage the chip when tightening the heatsink. If i tried to slide it in after tightening the heatsink, then it might be loose enough to fallout again? Do you have a link on where to buy these Dupont pads?

Or how about several thin pads on top of each other?

Quiksilver - not sure what thermal epoxy is? It was like bluetack though? Not paste.

 

[Gillbot]

if it's closer to 1mm then a thermal pad would be fine, just use something like this:
0.5mm & 1mm thickness: http://www.koolance.com/water-...nfo.php?product_id=580
unknown thickness: http://www.sidewindercomputers.com/colimeforamd.html
1mm thickness: http://www.petrastechshop.com/67ektimpad.html

 

[Zepper]

Yeah, AS5 is designed for thin layer. Expensive to fill a thick space with silver... Seems better to cut off the excess part of the CPU sink and get a separate sink for the NB.

.bh.