need advise quickly

[MrT]

Can't seem to find this "Thermal Epoxy" anyware. Esp. At Radio Shack. So went to parts house and the closest thing they had was Permatex "HIGH TACK" all purpose sealant.Comes in a little can and you use a brush to put it on. Adheres and seals from -65F to +500F.
can be removed with lacquer thinner.
Wanting to replace old heat sink on video card with new heatsink and fan combo. Will this work???
Help ASAP.
thanks
P.S. Can you put a larger heatsink on top of another heatsink? I was thinking about putting a Pentium Heatsink/fan combo on top of the little heatsink on the video card. Will it work and if so, do you just epoxy it onto the existing heatsink???

[This message has been edited by MrT (edited 08-08-99).]


[This message has been edited by MrT (edited 08-08-99).]

[Danzego]

Never tried it before but I would stick to the stuff you know works. Wouldn't want to end up putting lacquer thinner on your proc would you?

[MrT]

No one seems to know what the heck I am talking about when I ask for Thermal Epoxy?
What else can I use? Or is it called by another name? I really need to get this stupid little heatsink off this card. Also I am going to add a fan/heatsink to my other systems video card. It doesn't even have a heatsink and it gets rather HOT. Hope someone can give me some info. Would order some of the stuff there advertising on the web, but someone has aquired my credit card number somehow, probably thru the web. So no-more ordering over the web EVER again. **** scumbags!!!!!!!
Anyways, thanks.

[CMonster]

Go here: www.epotek.com/products.html (http://www.epotek.com/products.html) to get a better idea what you are looking for.

Regular 2-part clear epoxy (5 or 30 minute) will work, use a very thin layer and make sure that you have no air gaps - add a single drop in the middle after spreading a thin layer and press the heat sink down evenly.

You can purchase this epoxy just about anywhere.

To increase the thermal conductivity of the epoxy, before mixing it, you can add about 50% by volume (1/2 the size of the pile of epoxy)of any of the following:

*titanium dioxide

*zink oxide

*red iron oxide (powdered red concrete dye)

*red copper oxide

All of these are available at most ceramic/pottery making supply stores.

There are even better things that can be added to epoxy, notably: extreramly finely powdered copper or aluminum, but it is sometines difficult to locate a cheap local source.

I'm not surprized that Radio Shack doesn't have the epoxy, but I am surprized that you haven't been able to locate a source anyplace else.

OH, BTW, you will be sorry if you use the "HIGH-TACK" it will slip and slide once it gets warm and it is a nightmare to clean up.



[This message has been edited by CMonster (edited 08-08-99).]