SeV.o3 TwiZZler Posted July 8, 2004 Posted July 8, 2004 I bout to lap my HSF the ZALMAN CNPS7000A-AlCu back to my question Ive herd stories of lapping some ppl after lapping lost only 2-3 Quote Share this post Link to post Share on other sites More sharing options...
broooooooce Posted July 8, 2004 Posted July 8, 2004 I'd imagine it just depends on how rough the bottom is. You want as close to a mirror finish as you can get. Thankfully, the Zalmans come smooth--mine did at least. Bruce Quote Share this post Link to post Share on other sites More sharing options...
hardnrg Posted July 8, 2004 Posted July 8, 2004 it's always gonna give you lower temps... work up to at least 1200 grit, 2000+ if you can... remember to let the paper do the work, use the least amount of pressure to keep the sink flat on the paper, if you apply pressure you run the risk of making the surface convex... don't be shy of using water, rinse the paper out every once in a while... have some good tunes queued up to keep you rockin while you are lapping, it's a lengthy lengthy job... good fun all the same, rewarding definitely Quote Share this post Link to post Share on other sites More sharing options...
anthony Posted July 8, 2004 Posted July 8, 2004 it works IF DONE PROPERLY. for example.. it MAY be smooothe but what if it was slanted? Like, one side is higher than the other? kinda like this \ \ that wouldnt help your temps Quote Share this post Link to post Share on other sites More sharing options...
Xavirious_ Posted July 8, 2004 Posted July 8, 2004 ... yea, lapping will always give ya better temp. It may be a small change, but it may give that that extra 100Mhz your looking for. As he said...get up to at least 1200 grit sand-paper going in as close of incriments as you can. And make sure that you are consistant on each paper grit in taking the same movements and the number of times you run it on each piece. It works great if you make a jig to slide the heatsink in. Its best to attach the paper to a flat surfance and move the heatsink back and forth, not the sandpaper. Happy OC'ing and as always.. Quote Share this post Link to post Share on other sites More sharing options...
Byron Posted July 8, 2004 Posted July 8, 2004 it works IF DONE PROPERLY. for example.. it MAY be smooothe but what if it was slanted? Like, one side is higher than the other? kinda like this \ \ That is why you rotate the hs.... Quote Share this post Link to post Share on other sites More sharing options...
The_Goonie Posted July 8, 2004 Posted July 8, 2004 just to save you guys a little time....use any fine grit to scratch the surface...then take steel wool and rub the crap out of it..then take some "mothers aluminum polish" and buff it to a nice shine. Quote Share this post Link to post Share on other sites More sharing options...
TheSternMystic Posted July 8, 2004 Posted July 8, 2004 just to save you guys a little time....use any fine grit to scratch the surface...then take steel wool and rub the crap out of it..then take some "mothers aluminum polish" and buff it to a nice shine. Toothpaste is my last step. I started with 1000 grit, cause lower grit is too low and just scratched it all to crap before it gets better. Stopped at 2000 grit, then took a clean damp cloth, a dab of toothpaste, and gave it a good rubbin. Quote Share this post Link to post Share on other sites More sharing options...
hardnrg Posted July 8, 2004 Posted July 8, 2004 steel wool? it isn't a casserole dish with baked on food! (edit: ok, maybe it has some food in it between it's teeth! ) lapping guide i wouldn't use steel wool at all... Quote Share this post Link to post Share on other sites More sharing options...
TheSternMystic Posted July 8, 2004 Posted July 8, 2004 Especially not Mom's Aluminum polish, who knows what it leaves behind. Quote Share this post Link to post Share on other sites More sharing options...
hardnrg Posted July 8, 2004 Posted July 8, 2004 you can use polish as long as you clean it off thoroughly with high purity isopropyl alcohol (such as Akasa TIM-clean)... cos yeah, it does leave a film of er, polish behind... Quote Share this post Link to post Share on other sites More sharing options...
BabyBalrog Posted July 8, 2004 Posted July 8, 2004 lapping is great. espesially on older HS beffore the OEMs started doing a better job at it themselves Quote Share this post Link to post Share on other sites More sharing options...
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