yea actually the method mentioned using something like a brush or a block of wood for sanding is the appropriate way in sanding off excess material. but in this case not so appropriate as u will apply uneven pressure on to the surface of the heatsink. just my 2 cents

It's also believed that by using the heatsink's weight, u wont me sanding off too much of the copper.

This is a very nice guide. Why don't this get pinned?

good idea

wah very nice lor u lapping..mus quite a lot of work...

has anyone lapped xigmatek s1283?

does the thinning of the heatpipes can cause any effects?

i wouldn't recommend that.. as the heatpipe are hollow inside.. u may break it as the layer thins..

hmmm..juz take a sand paper and juz lap like tat?
no nid use water or any other stuff??
if i did wrong on the lap step or anything, does it will cause any problem to my cooler?

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Added on May 28, 2008, 2:46 pmand sand paper gt 2 type, 1 is normal one, and one is water sand paper??
or we call it 水砂纸 in chinese..which one will use ?

This post has been edited by melvintcs: May 28 2008, 02:46 PM

no need water la... normal sandpaper is enuff... if lap wrong then relap it lor... its so easy i doubt that u will get it wrong...

lapping s1283 is dangerous as u might lap a hole and crack the whole pipe. but imho it does provide some improvement and if u start off with higher grid sand paper (more fine) i dont think it will cause anything but better surface.

This post has been edited by ham_revilo: May 30 2008, 01:41 AM

are heatpipes that thin?

hmm i dunno
dont dare to try it
but really curious to know if anyone had lapped s1283

coz i think s1283 surface is really gritty
wonder how much °C can be shaved off by making it a mirror surface
and wonder how nice the HDT mirror surface would be

the heatpipes r not solid.. They have pores of water for optimum heat transfer..

mirror finish doesnt affect the performance. flatness does. anyways when i lap my s1283, 2-6c different. and i dont think HDT mirror surface will be easy as i find it hard to get a mirror finish.

hey guys
i was wondering is it ok if i use a sanding block rather than
tapping d sand paper to d mirror/flat surface?
or would dat be risky?
tqs ayyy

p/s:

and btw.....i have my own opipion on the pores
pores and microcrevices contribute to improper heat transfer
tis is due to d face dat the heat transfer will be going tru 2 medium....
1st being air stuck in between the heatsink and processor (convection)
and 2nd is the heat sink(conduction)
in our case...conduction is prefered as copper has better thermal conductivity than air

in manufacturing term
achieving mirror finish equals to having high surface finish
tis contributes to better surface contact between the heatsink and processor
thus achieving optimum heat transfer tru conduction


correct me if im wrong.......
all my opinion are based on my understanding of heat transfer
im jess a noob in tis
if i have time..i will try to post how d free body diagram looks like for tis heat transfer process


This post has been edited by dro: Jun 1 2008, 02:13 PM

bro..u lapping ur s1283?any risk should i now?coz i juz buy s1283 and it`s great even without lapping

i have already laped and to know more result, pls look at this :

http://forum.lowyat.net/topic/652536/+500

and about risk, just dont use too low grid (more coarse). anyway i start off with 1000, 1500 and finish with 2000 grit. during the process i dont get any complication. so i guess its kinda safe as long u dont start with high grit like 400grit.

happy lapping mate (if u are going too )

This post has been edited by ham_revilo: Jun 2 2008, 02:07 AM

imo sanding block works fine but lots of ppl said it wont provide an flat surface. that the whole reason y ppl use glass coz its flat. i havent tried it before so i dont know how's the result. or maybe if u would like to give it a try. maybe u could prove me wrong

btw, about what u said about pores. imo if the pores difference are too small, it doesnt affect much. i mean if u use 1500grit and 2000grit, obviously 1500grit would have more coarse pores but i dont think it will affect much compare to those after using 2000grit. the affect will not differ much as both pores are almost the same. for me, i think maybe at most 0.5 or 1c difference.

anyway its just my opinion.

tqs for d sanding block advice ham_revilo
ima try lapping my hsf soon too

i agree on the fact dat the final quality between 1.5 & 2k grit will not drop by much
prolly around the range u mentioned too
it depends on how rajin u are to spend time on lapping la mostlyy
cuz i dun tink i'd achieve mirror finnish if i do lap mineeee
mebe afta a couple of trial.....just "mebe" i can get dat ultimate finnish

good luck and be careful not to destroy the cooler...

no prob bro. remember show some pics of ur lapped HSF when u are done and like icemocha said, dont over do it bro or not u will destroy ur HSF