Hi,
so I've been reading up on lapping guides and decided i'd give it a test run on an old Athlon 64 3000+.
I started with 320 grit sand paper, then 600 grit, eliminating the aluminum layer entirely to reveal the copper beneath it all across the IHS. Initially, i moistened the sand paper with a little water, but this became a big hassle as residue started to clump up and make the lapping process akward, so i stopped the wet method. Is there a difference? Should I just stick to dry?
Also, I'm wondering what the criteria is for a successful lapp. I've read that you can check to see how flat your CPU's IHS is by putting a razor blade across it and holding against light, and i've done this on my test run, but a little light still peeks through, although nowhere near as much as before I started lapping.
Are successful laps those that have no light peeking through between the razor blade and the IHS? Should I go back to 320 grit or 600 grit to make it entirely flat? I plan on getting 1000 or 1500 grit paper for the final lapp on this test CPU.
And what about motion? I wad doing straight lines back and forth, trying not to apply pressure onto the CPU. I've read that circular and figure 8 lapp patterns might work too?
also, I was doing this test run because I plan on getting a Q6600 which I might possibly lapp if the need arose.
Thanks
edit: btw, this is what a lapped CPU looks like:
so I've been reading up on lapping guides and decided i'd give it a test run on an old Athlon 64 3000+.
I started with 320 grit sand paper, then 600 grit, eliminating the aluminum layer entirely to reveal the copper beneath it all across the IHS. Initially, i moistened the sand paper with a little water, but this became a big hassle as residue started to clump up and make the lapping process akward, so i stopped the wet method. Is there a difference? Should I just stick to dry?
Also, I'm wondering what the criteria is for a successful lapp. I've read that you can check to see how flat your CPU's IHS is by putting a razor blade across it and holding against light, and i've done this on my test run, but a little light still peeks through, although nowhere near as much as before I started lapping.
Are successful laps those that have no light peeking through between the razor blade and the IHS? Should I go back to 320 grit or 600 grit to make it entirely flat? I plan on getting 1000 or 1500 grit paper for the final lapp on this test CPU.
And what about motion? I wad doing straight lines back and forth, trying not to apply pressure onto the CPU. I've read that circular and figure 8 lapp patterns might work too?
also, I was doing this test run because I plan on getting a Q6600 which I might possibly lapp if the need arose.
Thanks
edit: btw, this is what a lapped CPU looks like: