Lapping big typhoon, new mobo, p180 cooling questions

kaluminati

Member
Dec 11, 2004
51
0
66
So I made an attempt at lapping my big typhoon heatsink, and the e6400 IHS. Something tells me I screwed up the heatsink, because I'm not seeing any difference in temps. I used 400, 600, 800, 1500 (all I could find). My problem seemed to be that after a few strokes, the sand paper was full of copper and didn't seem to sand much after that. I did wet it down again after that, but I think the mistake I made was dabbing a paper towel after I put water on it... I thought that I read somewhere in a guide that after you wet it down, you're supposed to absorb the excess water sitting on top of the sand paper. Perhaps I read it wrong...

How many times (roughly) do I move it across the sand paper (taped on flat surface)per position (ie turning it 90 degrees, 4 times) per grit? I had a hard time getting any visual confirmation of the effect it was having, aside from the brown stain on the sand paper =D

I'm using AS5. I guess I'll try to sand it down with the diff grits a little bit more, and this time keep a little more water on while sanding, adding more when it gets copper'd up.

Currently I'm using an Asus P5B mobo vanilla, and I'm looking to get one of the newer (and sli capable) boards, but around $150. Recommendations? Yes, I do want to overclock, but not anything uber crazy.

And I'm thinking of modding the door on my p180 to add an intake fan above the typhoon, because when I have my case open, temps drop 7c.... And I have an antec tricool on high as my intake fan on the top section + very little blockage from any cables, most are tied down.. Anyone else notice this with the p180? (I guess it would be kind of obvious.. but maybe someone has a diff fan setup that helps) I assume anyone who has modded the panel just uses a dremel?
 

Bluefront

Golden Member
Apr 20, 2002
1,466
0
0
There are many different lapping techniques. I suspect many people have problems because they don't clean off or exchange sand-paper frequently enough during the process. The copper fragments then get ground back into the heatsink surface, scratching it.

Better grades of sandpaper can be simply cleaned in a water bucket, then continued being used. I mean like every minute or less. I use WD40 to clean sandpaper......the paper lasts longer. Just spray off the copper fragments. IMHO....it is essential to use some sort of lubricant during the lapping process. Again WD40 works well. Never allow the paper to become dry while you are lapping. Use different sections of the paper, and throw out the sheet every few minutes.