Another lapping question - sorry...

Sorry, I know no one wants to read whole threads on "what's lapping?" or anything like that, so I'll try to keep it usefull.

I understand what lapping is, how it works, and why we do it, and I have lapped heatsinks before. My question is how to effectively lap chips like GPU cores and northbridges, where you can't run them directly over sandpaper placed on glass (because they are attached to PCBs).

So, how do people effectively lap on-board chips?

That is a more difficult thing to do. First off not many chips need it but when they do I would recomend using steel wool. Depending on how rough it is you will want to start with a Medium and then move up successively until you reach ultra fine or what ever the finest is. This should do a good job of lapping it. Make sure you either blow the board off or vacuum it off before using it because if there is a shred of metal it could cause a short circuit and fry your board.

Thank You,
Daniel

You can use steel wool, or cut some sandpaper, and put it on a sanding block.

Motherboard F&Q

Click on these links...

Epox NF2
Mods
Northbridge Lapping

This is pretty much a step by step guide on how the lap a northbridge...

glock19owner said:

Motherboard F&Q

Click on these links...

Epox NF2
Mods
Northbridge Lapping

This is pretty much a step by step guide on how the lap a northbridge...

Click to expand...

Sweet. Exactly what I was looking for. Thanks very much.