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XP-120 HS has a small scratch in the bottom...

W

WangoZ

Senior member
Hi,
I purchased the XP-120 HS from a fellow member for a reasonable price with a small scratch on the bottom of it...(I knew about the scratch). He used the HS as it is and it performed well without having to lap it, said there may be a 1 to 2 degree difference...Is this something I SHOULD lap before mounting it?? I've no experience here and am not afraid to try, just think for a degree or 2 there may be no reason...Any opinions on how I should handle this IF I should even bother?

 
Might be worth lapping it just for the experience, but performance wise I doubt it would make an appreciable difference.
 
use as is, just put a small amount of your thermal goop onto the heatsink, wipe it around the heatsink with your thumb in a plastic glove until you cant really see the thermal goop. Then apply normal to the slug and slap that thing on!
 
heatsinks actually work a lot better when there are little holes on the bottom so the heat can pass through. With it totally flat, the heat just stops right there and doesn't get transferred.
 
Originally posted by: deathkoba
heatsinks actually work a lot better when there are little holes on the bottom so the heat can pass through. With it totally flat, the heat just stops right there and doesn't get transferred.
Click to expand...

mmmmm....i dont think so tim. i suggest you pick up a thermodynamics or heat transfer book and do some reading before making statements like that again.
 
Originally posted by: deathkoba
heatsinks actually work a lot better when there are little holes on the bottom so the heat can pass through. With it totally flat, the heat just stops right there and doesn't get transferred.
Click to expand...


*Praying for sarcasm*
 
I doubt a single scratch will effect anything. If you lap it, any change in temperature will probably be due to the rest of the surface that's smoother... not because that single scratch is gone.
 
One thing I recommend (from the way I apply AS5), is to get a washcloth really hot, then squeeze out the excess water, wrap the AS5 in it, put it in a bag and wait 5 minutes. This helps make the compound softer, making application easier (obviously the neccesity for this only depends upon how you apply the compound).
 
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