Lapping a GPU - using what?

[<Grisu4>]

So well,

I know that there are many sites with articles about lapping CPUs, heatsinks and yes, they are simple to understand and easy to practice.

For lapping a heatsink or a CPU you take it to a flat surface and do 8s over the sandpaper ....

But lapping a GPU seems unequally complicate, because you can't just take the card and do your 8s. You will need something flat to do them over the chip.

But what flat thing do YOU use to do it? Just the heatsink? But how to attach the sandpaper? Or maybe a little piece of glass?

I would be very happy to get some answers about this freaky little thing ...

[Da Whip]

Here are a few GPU lapping how to's ;

http://www.ocaddiction.com/articles/howto/lapping/[/URL]

http://overclocking.telefragged.com/cooling/videolapping.html
[/URL]

http://www.cool-computers.com/site/default.asp?dir=5%2EArticles&subcat=Lapping&doc=Lapping+a+Geforce+3D+Prophet+DDR%2Ehtm[/URL]

[<Grisu4>]

Thanks for the links.

I knew two of them, but the one where they use a part of a CD for lapping I didn't know.