Is it worth lapping led stars?

[Paul Baldwin]

I've got some generic 3W leds and the rear face of them isn't particularly good. You can see and feel very slight ridges with your fingernail and theres the odd scratch visible. I've just lapped a couple more pc sinks to 400 grit, suprising how out of flat they are! So should I carry on and do the stars too?

Ta

Paul.

 

[-Gast-]

I dont think so...


And the CPU-Heatsinks arent flat cause the heatspreaders arent flat too... If you lap the Heatsink you should do so with the cpu Heatspreader.

 

[blasterman]

If both surfaces are lapped, or the heat sink is already very, very smooth, then it helps.

However, other conditions also apply such as the heat-sink not being under-sized such as a 3watt emitter on a VGA sink. You want a place for the heat to radiate to so the lapping aids in efficiency.

 

[Paul Baldwin]

If both surfaces are lapped, or the heat sink is already very, very smooth, then it helps.

However, other conditions also apply such as the heat-sink not being under-sized such as a 3watt emitter on a VGA sink. You want a place for the heat to radiate to so the lapping aids in efficiency.

Ok Thanks They are reasonable sized heatsinks and don't run too hot without a fan but I think I might run these with and see how long the fans last this time.
I've found you can get away with xpg R4's on the vga "snowflake" sinks without the fans running without too much of an efficiency hit but haven't tried one of these generic ones as yet.
I was just trying to help them along a bit as they deffo aren't as good as others I've had.