Quote:
|
Getting interesting day by day...... 1200 already enough to make it mirror like finish; 2500 will make it feel like a baby's *** smooth. Making a 30-45 minutes lapping job into days of rubbing with 2500 grit. I thought the purpose of John's article was about less extreme. Considering 100% perfect condition; the TIM is 0.05-0.08 C/Wl it would be like running faster than your own shadow. |
Disclaimer: I sell more lapping kits than everyone else combined in the world. Having said that, there are probably some points to address: 1) JMKE, in my humble opinion, you only did half-a-job. Lapping a CPU will typically only provide 25% of the thermal improvement by lapping. The biggest advantage will come from lapping the heat sink, which is far likely to be manufactured to lower finish tolerances. This is even more exaggerated by AMD processors with die exposure. 2) in my humble opinion, you did not lap through the available grit ranges. While the majority of improvment from lapping does occur at P100-P1200, there IS marginal improvement by lapping to P2000 and beyond. 3) Even though YOUR particular improvement was only 1C, other people may experience more. A drop of 2-4C is average, with many people reporting even more. A 1C drop is actually fairly rare, and I have experience from customer feedback from thousands. There are lots of people who will spend $50 on a new heat sink in order to get a 3C drop. :-) 4) I'd like to see more details about your lapping method. How much lubrication did you use? Did you use a glass backing plate? What was the brand/quality of the sandpaper? How much Ceramique did you use when you reapplied your heat sink? Etc... These and more can be factors that would affect your end result. <edit - I saw where you used a mirror> 5) The return on investment is actually pretty reasonable. I don't know about everyone else, but I sell kits pretty cheap. If done right, even with the nine-sheet premium kit, it should only take about 1-1.5 hours to lap a large heat sink. Please understand, this post isn't a flame, I'm just pointing out some points that are worthy of consideration. In fact, I'll put my money where my mouth is.... JMKE, PM me and I will send you a free premium kit to take a look at and try out. Fair enough? BTW... I have sent a couple of premium kits to Madshrimps, one to use in a review and another to use as a giveaway. Should actually be appearing soon. |
Lapping heatsink does have more return of investment than simply replacing heatsink fan or just the IHS. Due to manufacturing process in Mass, surface flatness is "always" questionable; hence Intel stock Hsf uses pad to "cushion" automated manufacturing process. Cutting, casting curling processes generate heat which cause the metal surface to "cure" or "settle" in different rate. Lapping an Intel Stock sink alone (both copper or alum) always yield a few Cs' reduction. With a few C's reduction from Intel Stock Sink, you are into the 3rd party high performance sink performance territory. Based on my hobby in "sword and knife" over many years; a right job in lapping of two surfaces creates a so call "suction" effect that it seems to be super-glued together. I only use glass block (8"x10") start with 400; 800; 1200 and finish with 1500 and a few drops of detergent and end with sewing machine oil. My problem with lapping is; you'd almost have to re-do after each installation specially with "real" copper being soft the impression of the IHS is shown on the sink. Improper lapping could ruin the sink. ;) Should try with NB and Graphic card sinks; you'd be surprise!! Depends on how many give away --- we need a workshop in lapping before the LAN Party. :rolleyes: |
Well, I don't mind sponsoring the odd contest or two. Good for the site, good for my business too. I don't want to give TOO many away, though. :D |
TerAngreal is using the EasyLapping kit on his P4 , after a few hours this is the result -> |
He will post temperature results very soon :) here's a close-up: |
this is what the victim looked like before i started the 2 hour lapping job :) |
keep in mind that lapping does not help one bit if you don't straighten out the concave form. It might look like a mirror, but that doesn't mean the surface is flat. |
All times are GMT +1. The time now is 11:32. |
Powered by vBulletin® - Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO