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Date: | Sat, 22 Jan 2000 22:02:11 EST |
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In a message dated 01/22/2000 5:10:58 PM Eastern Standard Time,
[log in to unmask] writes:
<< If you want the utmost in heat sink compound, get silver based Vs. zinc
based grease. It is 10 times more effective and can lower CPU temps by 10°
or more over zinc based greases.
Chemtronics (800-645-5244) makes it. Their product number CW7100. Being
silver rather than zinc it is more expensive. A .23 oz tube is around $15.
An important note whether you use zinc or silver grease is to use it
sparingly. Use only enough to fill in the gaps. Lapping the heatsink on the
CPU after application is a good way to distribute the grease. Lifting (not
sliding) the heatsink off the CPU will show a ripple area on the grease
surface where this is contact and sufficient grease.
Daniel Wysocki
>>
Hi,
One important point you fail to mention is that silver heatsink paste is
electrically CONDUCTIVE, and will short things out if you get it on ANYTHING
but the CPU to heatsink interface. The zinc oxide grease is NOT electrically
conductive (but highly thermally conductive), so you don't have this problem.
The silver grease is slightly more thermally conductive, but the risk of
damage through smearing to unwanted spots makes this a VERY risky suggestion.
If you do get it between pins of the CPU, or even more so, the cache chips,
it is nearly impossible to completely clean out (the pins on cache chips are
extremely close together). That's assuming you catch this before you apply
power, and possibly fry something.
I have used the silver grease on a couple of occasions, and it made no
measurable difference in the temperature of the CPU Vs the zinc oxide grease,
both properly applied. Therefore, I would be hesitant to recommend it, (not
to mention the MUCH higher cost of the silver paste).
Just my .02 worth,
Peter Hogan
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