my first lapping...intel stock heatsink.quite satisfy with it




after apply thermal paste




This post has been edited by id86: Feb 26 2007, 09:45 AM

the thermal paste looks like not widely spread evenly.

i just want to test it...only attach to the proc for a few seconds

thats why it seems not spread evenly

By usin' polish, u might b introducing impurities onto the HS surface. This may affect the heat transfer capabilities negatively

Ask bombman he can find for u, i got mine frm him.
Actually u dont need till 2000 grit 2 get mirror finish, 1500 oso can but it require lots of hardwork and continuous sanding. I did it 2 my heatsink, almost 1 hour just to make it mirror shine.. imagine the feel of my arm after that

yep, metal polish= Big no no.
it's just for cosmetic purpose, it will degrade the heat transfer capability.

mirror shine looks cool and all, but the only one that can see it it's the proc

if you really nead to acheive morror shine, do it without the use of polishing compound.

Question is, how much of an effect? I'm guessing not more than 1C.

very minor until not more than 1'C

this lapping process remind me when i'm doing my lab excercise while i'm in 2nd year at Uni.1stly i'm using different grid of sandpaper like the one used by TS.then i move to lapping machine with rotating mechanism at the midle.i add some alumina powder to the machine and begin to lap the metal.the result very2 good la...mirror shining untill u can see your own face very clear...much more near to glass mirror...

p/s:that time i have to lap from freaking corroded metal to mirror finish.that @#$$ technician really lazy to prepare some other good metal.take very long long time to be finish....

will try to slip in to the lab to lap my heatsink some other time.wish me luck..hehe...

i guess if you are not so anal about 1 degree, you wouldnt lap your heatsink in the first place....

Good point. Though its hard to argue something that can't be backed up with results because its near impossible to measure accurately.

yup...some ppl lapped and get much temp different and some get few degree oni. so 1 degree for those getting little different in lapping for them is hell damm important!. but for me tat get 9 degree drop....i dun care haha



u study what course? material engineering?

This post has been edited by GKWong: Mar 8 2007, 10:52 PM

yup..materials engineering.Y??same with u arr??

hehe...noler....but my bro is...
u that machine for lapping i think is better than our hand alot. coz our hand sometimes can not be always balance.

i wish i also can lap my HS in my lab...
not enough time to go there...class to pack

i still dont understand how u all lap ur heatsink till mirror shine

You should try it yourself first. Get an old heatsink (preferably aluminium as its easier) and lap it flat with course sandpaper. Gradually move on to higher grades of sandpaper, around 1000 onwards it will be smooth enough to see a faint reflection. After that if you polish it with metal polish you will get a mirror shine, but its not necessary.

kayy..i have an old aluminium heatsink..but the thing i dont understand is how to lap it...i read at somewhere and it says put some water on the sand sandpaper and soap on the heatsink...and metal polish is? car polish or what? :LOL:nooob here

You need some sandpaper meant for sanding metal, they usually are waterproof and typically have a grain of at least 300. You should start with ~300, make sure you use a flat surface like a piece of glass (flatness is more important than anything else). You will need some water on the sandpaper or you will not be able to do it smoothly. Soap is not necessary, but washing the heatsink with soap after you're done will help remove all the metal powder stuck on it. Examples of metal polish are brasso and autosol (my favourite). For aluminium, its impossible to get a full mirror finish without polish because it tarnishes too quickly. Its easier to get a mirror finish on copper but it takes longer because copper is harder (keras) than aluminium.

Heres some pix of my tuniq before and after lapping

Before



After



Temps:

Before lapping: 40'c, 1 day after installing, actually same temps as BTVX, but BTVX running faster @ 1780rpm +-, 120mm Vizo UV Led Fan

After lapping: 36'c, this is immediately after installing
Fan: tuniq stock fan @ 1260rpm +-


TIM: Arctic Silver 5, Arctic Ceramique on heatpipes/base

Temp Monitor: Coretemp

Fan Monitor: Asus Probe II

Another reason for the better temps could also be acounted to the fact that second time round, i mounted the tuniq better.

This post has been edited by cablesguy: Mar 13 2007, 01:41 AM