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Heatsinks and glue (Read 542 times)
janskjaer
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Heatsinks and glue
24.07.04 at 11:26:19
 
I had a Gainward Dragon 3000 delivered through the post (roughly) today to find that one of the heatsinks has fallen off on of the chipsets!  Shocked Cry

It's still a little sticky (Gainward can't have used glue then to stick the heatsinks on) but I don't know if it will always hold!

Therefore I was wondering if I should apply some glue to it? But what glue can I use? Standard glue? Super glue? or some special glue for heatsinks? Anyone have any suggestions? ???
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NitroX infinity
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Re: Heatsinks and glue
Reply #1 - 24.07.04 at 12:34:19
 
You need a thermal adhesive:

http://www.arcticsilver.com/

Check Products > Thermal Epoxy.
Either Alumina or Silver will do.
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janskjaer
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Re: Heatsinks and glue
Reply #2 - 24.07.04 at 12:54:58
 
Thanks for the tip. Smiley

But just out of curiosity, if I was to use standard domestic super glue (not that I will, of course), what side affects would I get?
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Re: Heatsinks and glue
Reply #3 - 24.07.04 at 13:07:46
 
probably nothing, but when the chip goes 50c, im'a bet my shnitzel that the glue will vaporize

You can pick up some Arctic Silver 5 for .. um .. 9$ on ebay, don't go for anything less than that
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VDX
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Re: Heatsinks and glue
Reply #4 - 24.07.04 at 17:02:22
 
well dont take this as a thing for you to do but i use the super glue, my reason is you have to apply a bonder to the artic silver which makes it about half bonder and half artic silver and you also have to apply it much thicker for it to work, now i have not done any testing on this at all as far as which way will transfer better heat but i can tell you both ways have worked for me i just perfer the super glue, super glue makes a much closer contact with the chip to heatsink and the artic silver/bonder has better heat transfer for the same  thickness, thing is the super glue goes on at a fraction of the thickness of the artic/bonder, so thats my feelings on it, like i said ive done no real test either way, right now my v5500 goes 200 o/c with 2 gforce ti4600 copper heatsinks super glue on it.
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paulpsomiadis
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Re: Heatsinks and glue
Reply #5 - 24.07.04 at 19:29:55
 
Allo mate! Grin

Righty ho - a botched heatsink will NOT stand in your way! 8)

Follow this little tutorial... Wink

1. Clean off the excess stuff from both the heatsink and the top of the chip (CAREFULLY use a stanley knife and 'fine grit' sandpaper, until both surfaces are smooth and free of goop) Wink

2. Use some cleaning alcohol to remove any fine dirt from both surfaces. Cheesy

3. Go and buy some ARCTIC ALUMINA from your local internet shop... 8)

Info available HERE: -

http://www.arcticsilver.com/arctic_alumina_thermal_adhesive.htm

Buy from HERE: -

http://store.over-clock.com/copy_of_Thermal_Compounds.html

(at the bottom of the page) Tongue

4. Mix a 'measured' amount of the compound on top of the chip (not too much!) and spread out finely over the surface of the chip. Cheesy

5. Place the heatsink onto the chip and make SURE the card lies flat (prop it up if need be...) Tongue

6. For the glue to dry, it only takes a few hours - but for a TOTAL setting, it's best to leave it for a 24hr period. Roll Eyes

(Remember to be sure the card is FLAT, otherwise your heatsink will be WONKY!) Shocked

7. Enjoy your repaired card! Grin

Nuff said! 8)

==EDIT==

Side effects of superglue are... Roll Eyes

1. Smells when it heats up too much. Tongue

2. Heatsink will FALL OFF if card gets too hot. Roll Eyes

3. In EXTREME cases, it can damage the chip by taking the surface off of the chip if the heatsink falls off again. (although this is VERY rare!) Shocked
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« Last Edit: 24.07.04 at 19:32:38 by paulpsomiadis »  

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whodovoodoo2man
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Re: Heatsinks and glue
Reply #6 - 24.07.04 at 20:15:10
 
Hi,

When I watercooled my Voodoo 2 graphics cards, I glued the copper heatsinks onto the chips with a very fine smear of ordinary 5 minute epoxy (Araldite).

Personally, I don't see the value of those expensive heat conductive epoxies, ordinary epoxy conducts heat very well, plus the heat has to get through the plastic case of the chip anyway.

Superglue is okay, I guess. However I never 100% trust it, as it has a tendency to go brittle. Epoxy remains flexible (within reason) so always remains tenaciously grippy!


Andy
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NitroX infinity
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Re: Heatsinks and glue
Reply #7 - 24.07.04 at 20:28:00
 
Epoxy: A big flat pancake between your chip and heatsink.

Thermal Adhesive: fills up microscopical dents/scratches in your chip and heatsink which increases the surface of both elements (however tiny that increase is) allowing for better cooling. Okay, the adhesive will make a flat pancake between the chip and heatsink but it will not be as thick as epoxy. This conducts heat better Smiley

Oh, and superglue should never be used alone. Use it with either epoxy or a thermal compound (Arctic Silver 3 or 5)
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« Last Edit: 24.07.04 at 20:30:48 by NitroX infinity »  
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VDX
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Re: Heatsinks and glue
Reply #8 - 24.07.04 at 20:49:58
 
haha, well its been close to a year at least 5 to 6 hours a day o/c and n/p with the super glue, i guess it doesnt know to fall off with all that heat lol, like i said works for me but heh
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VDX
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Re: Heatsinks and glue
Reply #9 - 24.07.04 at 20:53:35
 
and on that note, if i had a copper heatsink id use the copper paste, silver to copper or any other metal slows down heat transfer, saw the lab test on that one, same metal to same metal for best results
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« Last Edit: 25.07.04 at 02:37:55 by N/A »  
 
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Re: Heatsinks and glue
Reply #10 - 24.07.04 at 21:32:10
 
Hm, I've seen other people using Super-/Instant Glue before.

What they did is normally :

- carefully clean the entire Chip and Cooler surfaces
- create 4 or 5 small Points on Chip with Glue
- fill remaining area with a bit of thermal compound
(just don't have the glue and the compound mix if possible, in order not to compromise the glue's effectiveness)

I think there are thermal specifications for the several existing types of Super-/Instant glue normally found written on their packaging.
If it's rated for high enough temperature, it should work Smiley
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« Last Edit: 24.07.04 at 21:32:36 by FalconFly »  
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whodovoodoo2man
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Re: Heatsinks and glue
Reply #11 - 26.07.04 at 21:15:08
 
Quote:
and on that note, if i had a copper heatsink id use the copper paste, silver to copper or any other metal slows down heat transfer, saw the lab test on that one, same metal to same metal for best results




I'd like to see those lab tests, because if that is true, then all those posh heatsinks with copper bases are a waste of money- might as well stick with aluminium!  Undecided

Andy
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whodovoodoo2man
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Re: Heatsinks and glue
Reply #12 - 26.07.04 at 21:24:19
 
Quote:
Epoxy: A big flat pancake between your chip and heatsink.

Thermal Adhesive: fills up microscopical dents/scratches in your chip and heatsink which increases the surface of both elements (however tiny that increase is) allowing for better cooling. Okay, the adhesive will make a flat pancake between the chip and heatsink but it will not be as thick as epoxy. This conducts heat better Smiley

Oh, and superglue should never be used alone. Use it with either epoxy or a thermal compound (Arctic Silver 3 or 5)



Epoxy is actually a pretty good thermal conductor, and I only use a tiny smear.

IMHO the money spent on expensive thermal pastes is better directed at bigger and better heatsinks, which will do a far better job of disposing of unwanted heat.

Andy
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janskjaer
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Re: Heatsinks and glue
Reply #13 - 26.07.04 at 21:30:53
 
Cheers for the recommendations guys!  Wink

So many to choose from!

Why don't I just get the good old Pritt Stick out and give it a dollop of that! HEHE!  Grin Cheesy

BOOM! Shocked

I'll probably try the combination of the epoxy and arctic silver! Decisions! Decisions!
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VDX
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Re: Heatsinks and glue
Reply #14 - 26.07.04 at 21:34:06
 
this is not the article i read, it was some scintific page somewhere i happened into, but this is what i use on my copper heatsink for my cpu and what they have down here translates to what i read pretty good-------------->





Price for online order only.

GeIL High Performance COPPER Thermal Compound, in 1 gram tube (enough for up to 6 P4's or 15 Athlon's).

Technical Detail
As heat generated from the CPU is transferd across thermal compound than to a metal heat sink, this creats a "thermal current" flowing from the CPU to the heat sink and gets dissipated by the cooling fan. This thermal current indicates how fast the heat sink is receiving the thermal energy and is limited to the slowest thermal conductive material. When this thermal current is ultimately limited by the copper heat sink, using a copper thermal compound will optimize the heat flow.

Theoritically, the best result should be produced by the best conductive compound. But when heat has to transfer between different materials, this change of material creates "thermal resistence" during heat transfer that hinders the heat flow (or slows down thermal current). This is the reason why a copper "coated" or "insert" on a alluminum heat sink's base doesn't work as well as an all-copper heat sink. (Alluminum dissipates heat better than copper. In theory, a copper coated alluminum heat sink should be able to aborb heat just as fast as an all-copper heat sink and at the same time, dissipates faster. Thus creating a faster thermal current. But in real life, after many tries by different well-known manufactures, the all-copper material proves to be the best cooling solution.) By using this patented copper thermal compund, thermal conductivity is optimized between the CPU and copper heat sink.

For those who are looking to replace their heat sinks with a copper coated or inserted heat sink, this compound will simply produce the same effect, making a difference of up to 5 degrees when used on traditional heat sinks.

Specification
7.5W/m-k Thermal conductivity
0.06 C-in2/W Thermal Resistance
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« Last Edit: 26.07.04 at 21:34:38 by N/A »  
 
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