CPU Lapping

[darkorb]

im lapping my A64 X2 3800+ S939

got 200/400/600 grit sand paper

doing the figure 8.

was wondering, how far do i go?

and should i lap my Arctic Cooler 64 Pro, the finish on it doesnt look that great

thanks!

ps: my friend is lapping his PD 940

any more tips would be great!

[7499richard]

you only need to pay until its flat
you should notice how unflat it is as you go by the amount of copper that begins to show in different areas. And I would lapp the cooler too, going to help you achieve the best temps that way.

there are some good lapping guides out there, google how to lap a cpu and you will find them

[SNiiPE_DoGG]

i never use those low grit papers, i always start with 800, the link in my signature shows my lap using 800-2000 grit wet sand and a big glass table, came out perfectly flat and grade a+ mirror with no polish

[r4st4m4n]

i never use those low grit papers, i always start with 800, the link in my signature shows my lap using 800-2000 grit wet sand and a big glass table, came out perfectly flat and grade a+ mirror with no polish

Well I don't know for AMD IHS, but for my C2D I had to use 200 or it would have taken forever to remove the nickel. I actually started with 400, and after 20-30 min I could only see like 1mm of copper on the edges, so I went for 200. In few minutes I got ride of the nickel and then used 400, 600, ... to remove the big scratches.

[darkorb]

alright thanks for your responses!!

turns out my cpu died, i dont no how, i was relaly safe with it

i put my CPU back in the machine boot'd up but nothing hapened, nutin on the screen. poped in my brother 3500+ and it loaded right up.

so gonna go buy another X2 for $73 (i dont wana spend more money on this computer by getting a Core2 etc.. and i cant reformat, too much stuff on my drive to lose)
__________________

[Lloyd]

i started with 400 then 600 and finished at 800
regards

Lloyd

[Scubar]

u want to be finishing on 1500-2000 grit paper really. anything less and its still to rough to get a proper flat surface with good contact.

[darkorb]

the only paper i could ge was from home hardware

started on 200, then 400, then 600

[7499richard]

you'll want to go higher then 600..try automotive store, they sell much higher

As for your dead cpu, thats sucks man

I don't really see how you could kill it just by lapping it unless you bent some pins, (I believe those AMD are pins?) or if there were metal pieces in the some of the pins and caused some shorts

Your supposed to clean it off with alcohol before you put it back into your computer.

Sorry to hear though.

[darkorb]

i used kleenex's/alcohol to wipe off the top, and i blew inbetween the pins if there were any metal shards in there to get out.

anywyas, new cpu is going good, testing it now at 2.7 with 1.45v (cant go higher than that..)