Applying AS5 on a Quad Core. Puzzled

Stonedofmoo

Stonedofmoo

Stonedofmoo

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Reading the Artic Silver guide on applying AS5 to a Quad core it suggest running a small line of it across the two cores... and thats it, simply allow that to expand a little

I don't get that at all. Why would that be better than applying a thin layer across the whole of the heat spreader which is what we have all done traditionally?

Smaller amount of paste can mean smaller contact area surely? :confused:
 
I might be wrong, but the smaller amount of paste you use the better because there is less AS5 for the heat to conduct through to your heatsink (as long as the whole area above the cores on the spreader is covered of course) - this may be why a small amount over each core is better to ensure that the cores are thermally interfaced to the heatsink without having excessive AS5 all over the heatspreader (which will increase the thickness of the AS5 layer).
 
In theory when you apply the heatsink the pressure from mounting it should be enough to smooth the as5 over the whole IHS, which should be checked to make sure you have good contact from chip to heatsink, before securing it.
 
Stonedofmoo said:
Reading the Artic Silver guide on applying AS5 to a Quad core it suggest running a small line of it across the two cores... and thats it, simply allow that to expand a little

I don't get that at all. Why would that be better than applying a thin layer across the whole of the heat spreader which is what we have all done traditionally?

Smaller amount of paste can mean smaller contact area surely? :confused:
Click to expand...

the point is, it's not humanly possible to manually apply a thin enough layer across the IHS.

putting a thin line across the cores squeezes the paste out into a thin enough layer on its own. similarly, the contact patch isn't as big as the IHS, nowhere near, even. paste outside the contact patch is just wasted :)
 
MurphyOCF said:
In theory when you apply the heatsink the pressure from mounting it should be enough to smooth the as5 over the whole IHS, which should be checked to make sure you have good contact from chip to heatsink, before securing it.
Click to expand...

How are you meant to check it without taking the heatsink back off? lol
 
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