3 degrees not bad la... some people getting only 1 degrees ...lol

But still, after checking the link that lolhalol gave to me, it's worrying me, maybe i should lap my heatsink to 600grit back...

Should i?

@shawty
bro no need 600 grit one lah...
1500 is very good aledi...actually if its flat u get a mirror finish, just dun sand until u cant see anymore lines sanding lines. u get wat i mean? i lappe my storm block and got a drop of 8 degress ,the base was so flat that if u put it on a mirror u can lift the mirror...

1500Grit?

The last sandpaper i use to lap my XP120 is 2000Grit...

Should i relap back?

dun think so leh... i mean the link i posted is down to ur interpretation on how mirror is. to me a flat base is enogh... bt u can always relap with 1500 and c the difference then if worse performing then lap again with 2000grti.. did u know i once lapped my tt beetle with 2500! grit, but no improve ment over a 1500grit laped beetle....

meaning that onli use grid till 1500, and 2000 is for mirror finish, is it?

Owh means we must not sand untill mirror shine huh?

But if not mistaken it wouldn't affect much since if the surface isn't really mirror shine the metal touching each other would be very little and avoidable.

This post has been edited by unamed: Dec 10 2006, 03:02 AM

maybe for certain heatsink, no matter how "mirror shine" u do it, it will reach it's max capabilities, so no point sanding it with 2000 grit for non-high end heatsink...

just a thought, nothing source of info to support

anyway, please let us all know if there is someone has expertise in this kind of situation

maybe someone who have real flat and mirror finish should try without putting any thermal paste and see how it goes

@littlelinnet
bro that would not work at all, becouse the processor ihs is NEVER flat. unless u lap it...

anyways, i dun mean that u have to stop lapping at 1500 grit , but in my persoinal exp 1500 grit is good enogh, 2000 grit is a bit waste of energy coz 1) the 2000grit is harder to find.
2) the perfomance gains is negligable ,ur looking at a region of 0.05 degrees.
3) it helps that the base is a bit "rough" , check the link i posted....

None of those IHS is flat?

Can someone help me in lapping my Pentium D 930 IHS?
I'm afraid to lap my Pentium D 930 IHS liao...

Lol, come send to pg and i'll help u

Won't there be any problems with the processor after lapping?

Kinda scared liao...

why there should be problems with the processor? can't think any

I'm afraid of electro static charge...

And afraid if after lapping, the result will be more worse...

This post has been edited by sHawTY: Dec 12 2006, 11:32 PM

well u need to know how to lap ... u cant use too much water..later u know lah..proc +water=

Well, if u dried it 1st and clean throughly before u use it, it wont be a prob

Actually I don't think it is a good idea to lap copper heatsink. Normally the heatsink is coated so it is not easily oxidized. Once you lap it, you will find out that the heatsink will discolor easily due to oxidization on the base compare to the side. Aluminium should be fine but so far most heatsink come with copper base.

True, but the coated layer will be gone after years of usage also U can always use arctic cleaner to minimize oxidization.

actually if didnt lap the hsf, when u use artic clean , it will actually dissolve the coating. bt u need to leave the cleaning liquid on the hsf for a while ...