Show us your IHS with a large dollop of lapping

[Justintime]

Yea, i know those are virtually unpoppable sadly, but it runs cool enough as it is. Like how you threw that in to damage my credibility or something lol.

 

[Jleo]

More hand lapping and this is from guys who use the good old lathe, they seem very happy with the results they get plus it makes their lathes more efficient. Good enough for them good enough for me, what do you think?
Mini Lathe

 

[Sir Random]

My old P4 2.4b had a rectangular depression in the IHS, which looked like it may have been caused by the machine which stamped the text markings on it.

As I lapped it, the shape of the depression became clearer.

It took a fair bit of lapping to get it level

My conroe IHS is very flat by comparison, so I didn't touch it. Temps are great at 3Ghz, stock vcore .

 

[Justintime]

Did it make much difference in temps after the lapping? I remember removing the IHS from my Prescott cpu.. god that was nerve wracking!

 

[xolotl]

Shining with a lapping/cutting paste not a household wax polish LOL

HS 1
A flat and shining surface = near scratchless surface = less TIM needed = more metal to metal contact = better heat absorption = better heat dissipation = efficient

HS 2
A flat surface that doesn't shine = more scratches = more TIM needed = less metal to metal contact = less absorption = less dissipation = less efficient

I really don't think I need to reply to this after what the other two guys have said.

To summarise though:

Shiny doesn't matter.

Flat does.

Hand lapping is rubbish.

 

[fornowagain]

More hand lapping and this is from guys who use the good old lathe, they seem very happy with the results they get plus it makes their lathes more efficient. Good enough for them good enough for me, what do you think?
Mini Lathe

Did you know that the older lathe beds were finished by hand and give better results than modern ground chinese lathes. Know why? Skill.

When I was a snot I trained under a time served Toolmaker, took 30 years to get as good. He'd lap it flat, I couldn't and I have a fairly good idea on what I'm doing. And the example you've given is just a gib, all it does it pull up the slideways, where's the flatnes results?

Hand lapping is the poorest method of improving the finish, if its all you've got, do it properly and try to minimise the feather edgeing. Here's a tip, the best way to lap for good contact is to lap the two components against eachother with a grit of a consistant size. That's how they used to do it in the olden days.

 

[fornowagain]

My conroe IHS is very flat by comparison, so I didn't touch it. Temps are great at 3Ghz, stock vcore .

Like mine, I look to the God Intel and give praise.

Some of these conroes are so concave it disgusting. There's two types of IHS in production, a bevel and a sharp edged. The beveled one's seem to be very poor.

P.S. Most markings are laser etched btw. I've not seen a C2D IHS off the core in person, but they're either billet machined or pressed. If they're pressed they could be all over the shop.

 

[Jleo]

I really don't think I need to reply to this after what the other two guys have said.

To summarise though:

Shiny doesn't matter.

Flat does.

Hand lapping is rubbish.

Some people like to be contrary just for the sake of it, if your lapping is rubbish learn how to lapp better

On the shiney non shiney aspect this is for the know it all's that claim it doesn't matter.

Copper oxidizes slowly in air, corroding to produce a brown or green patina. At higher temperatures the process is much faster and produces mainly black copper oxide.

Oxidation.... reduces copper's ability to transfer heat.

So which is more effective?

Shiney meaning less oxidised

So it don't matter how little difference it makes you are wrong when you say it doesn't matter.

 

[MikeTimbers]

The design of the early P4 IHS was intended to be not flat because under the Intel-specified heatsink mounting pressure, it became flat. Without the designed in non-flatness, under pressure it became non-flat. If that makes sense. So by lapping the IHS, it actually made it worse!

The only sink I ever lapped was an old Golden Orb. I drew a pencil cross on the circular base and then started with some 600 grit wet/dry paper on a mirror. Within a minute, the pencil on the outer edge disappeared but the pencil in the middle remained for more than an hour! That base was obviously not flat and benefitted hugely from lapping. On the other hand, my Alpha 8045 had a dull finish but when I did the same pencil test, it disappeared uniformly and I undoubtedly made the base worse than before.

It's not that shiny is not flat, but that shiny doesn't mean flat. It just means shiny.

 

[fornowagain]

Some people like to be contrary just for the sake of it, if your lapping is rubbish learn how to lapp better

On the shiney non shiney aspect this is for the know it all's that claim it doesn't matter.

Copper oxidizes slowly in air, corroding to produce a brown or green patina. At higher temperatures the process is much faster and produces mainly black copper oxide.

Oxidation.... reduces copper's ability to transfer heat.

So which is more effective?

Shiney meaning less oxidised

So it don't matter how little difference it makes you are wrong when you say it doesn't matter.

Just to be contray and something to think about. Themal heat transfer is dependent on the surface area in contact. A flat but slightly rough surface has the most surface area with a TIM in contact. A shiny but wavy surface has the least.

And from the above I don't see why a rough surface can't be as oxide free as a shiny one. The advantage of a shiny surface is the ability to remove said oxide manualy, i.e rub it off. Is that what you do when you clean it, deoxidise. I suppose you could get Barry Scott round with some Cillit Bang® turn that nasty cuprous oxide into phosphates

 

[Jleo]

It's not that shiny is not flat, but that shiny doesn't mean flat. It just means shiny.

Who said shiny means flat? bring him er now and tie him to the main mast and get me the cat o' nine tails yar tiven' varmin LOL

 

[fornowagain]

Who said shiny means flat? bring him er now and tie him to the main mast and get me the cat o' nine tails yar tiven' varmin LOL

You've been watch Pirates of the Caribbean again haven't you?

 

[Justintime]

Fact of the matter for me, remember, ME.. is that i've seen it reduce temps a fair bit and in quite a few instances over generations of cpus, it does work when done right and usually in cases where the manufacturer may have not done such a good job in the first place.

 

[Jleo]

You've been watch Pirates of the Caribbean again haven't you?

Big LOL

How can you live with yourself carrying that dirty dirty money around? LOL

Fact of the matter for me, remember, ME.. is that i've seen it reduce temps a fair bit and in quite a few instances over generations of cpus, it does work when done right and usually in cases where the manufacturer may have not done such a good job in the first place.

Justintime my thoughts exactly, if we keep lapping we'll convert them all, O lord forgive the non believers, shikes my hands getting sore lapping how are you fairing out? If I keeps this up I'm going to buy one of those megabuck machines can't wait 40 years to get good at this it'll kill me for sure. I wonder if I changed the word lapping to laughing and held up the Heatsink and laughed at it for 5 hours would it work better? I know one of non believers has and answer wait till you see. To be sure though you can't knock it to you tried. No answers, they either have tried it and got crap results or don't know how to do it LOL

Free to all non believers
Lapping for beginners Learn to lapp like a pro

 

[fornowagain]

How can you live with yourself carrying that dirty dirty money around?

Carry money? Far beneath me.

if we keep lapping we'll convert them all, O lord forgive the non believers, shikes my hands getting sore lapping how are you fairing out? If I keeps this up I'm going to buy one of those megabuck machines can't wait 40 years to get good at this it'll kill me for sure. I wonder if I changed the word lapping to laughing and held up the Heatsink and laughed at it for 5 hours would it work better? I know one of non believers has and answer wait till you see. To be sure though you can't knock it to you tried. No answers, they either have tried it and got crap results or don't know how to do it

I really don't think there's a sane response to that.

P.S. "getting sore lapping", that not what its called, at least it wasen't when I was so painfully young and inexperienced. We lived in a shoebox you know.

they either have tried it and got crap results or don't know how to do it

Story of my life.

 

[mrthingyx]

Funny, it constantly gave good results after the lapping whilst no matter how many times pre-lapped it was mounted it gave the same hotter result. I'm not a big lapper but have tried it over the years and its shown results, but as always there'll be detracters to a theory and expert opinions from various people etc.. thats y'alls belief and i won't disagree with you, you got your opinion and i gots mine Moot point about IHS lapping, i usually just pop it off these days.

Quaint.

I apologise for appearing to give you gip about your heatsink mounting ability, but the bottom line is that even those of us who have done it more times than we care to remember we will still get it wrong on the odd occasion.

Now, if it works for you, then awesome. But don't feel you have to defend yourself and your actions to me because to be honest, my computer just sits under my desk and works. The only reason it gets opened up is to clean the cat fur out of it.

 

[Gibbs]

what the circle hole all about?

 

[fornowagain]

what the circle hole all about?

Keyring?

 

[Gibbs]

ope not a keyring as you can see the green pcd threw it so its not a straight threw hole.

mounting hole for heatsink maybe

 

[Justintime]

The hole is for gases to escape so the IHS would adhere properly when put on, thats what i've heard anyhow.