[Istari1]

Alright so I'm gonna do this to my xp 1900+ either tonight or tomorrow for my thermal compound experiment, but I havent found any good info on lapping these cores. I am sure they need it (I've often heard they are slightly convex). But I cant decide if I should try popping the core off (if you cut the black glue around the edges it comes right off..I've heard) or simply just try to be very gentle. I figure I will start with 1000 grit, cause the core is already very smooth, then work to 1500 and finally 2000. 600 or 800 IMO would only hurt the finish. My waterblock is already lapped to a mirror shine, so I know how to do it, just want to see what you all think on it.

Josh

[AntiHeiss]

IMO, I think that is a bad idea. First of all, PLEASE don't try to take the core off. You will have a dead processor. And you can lap the core, but you aren't going to get it that much more smooth. I don't really think that you could even get the core so much more smooth that you would even notice a change in temperatures. IMHO, I just think the core is something you shouldn't play with. You can get plenty of great temperatures with your core as is. If it isn't broke, don't fix it. Thats what I think applies in this situation.
Just my .02

[parkan]

Separating the core from the package would render them useless

[cmcquistion]

I wholeheartedly agree. You won't make any significant difference by lapping it, but you take a great risk on killing it.

Also, you'll void the warranty.

2 more cents...

[Sonny]

You do know how fragile the core is right? Don't you remember people who chipped their cores & never booted up again? Sure there are a few people that actually have a lot of dents & chips on their core, I'm one of them, but everytime that happens you always start to wonder if it's dead already. If your hell bent on doing it then good luck

[Istari1]

Oops wrong forum, sorry I thought this was OVERCLOCKERS.com, not ohhletsoverlockwithouteverdoinganythingdangerous.c om. My bad Well thanks MOMs, but my question still stands. And BTW you CAN remove the top part of the core and re-affix it without "rendering it useless" I've seen it done and its really not difficult. So again, anyone lapped one of these, and if so how and if not how flat are they? My experiment is trying to find the least amount of AS2 possible and the best way to do this is to have two EXTEMELY smooth flat surfaces. My Wb is already there, but I dont think the core is.

Josh

[Neco]

It's not a great idea to make assinine comments about the people your looking for help from....


and in that spirit, go on and take a sharp knife, pop that core out. it works great you just need a little super glue to put it back on .

[Istari1]

It was a joke Neco, but thanks for making the thread longer without actually helping me at all.

Josh

[The Coolest]

Hmmm... I never heared of "popping the core out, and then replacing it back". I once did see a P-II being """Unlocked""", it wasn't a pretty picture, and I think (actually 200% sure) that if u do a "pop out" to the core, you will have a nice keychain.

About lapping, as already mentioned, lapping it won't do much good. the core is very thin as it is, if u lap it too deep u WILL have a dead chip on your hands. just something to think about.

[AntiHeiss]

Originally posted by Istari1
Oops wrong forum, sorry I thought this was OVERCLOCKERS.com, not ohhletsoverlockwithouteverdoinganythingdangerous.c om.
Josh

No problem. I guess you might just want to head on over there and ask them at ohhletsoverlockwithouteverdoinganythingdangerous.c om. And if they don't [H]elp you, then I'm sure there are people who can.

But really Istari1, what you are doing is just dangerous. And while it sounds like just a SUPER idea, I am not going to tell someone something that could destroy an expensive chip. And besides, that just seems like an excercise in futility. But you have fun trying. It seems like you know everything you need to know.

[Kendan]

Well after you pop the core off and ruin your chip why don'y you head over to whodoibitchatnowthatikilledmychipanddidnotlistento theoverclockersatoverclockers.com .

They will be able to help you deal with the loss

[tbirdkiri]

i do believe what hes trying to acheive is, a state at which bother surfaces are perfectly smooth or close to it.
this would be ideal because the as2 and as3 we use is only half as good as transfering heat as copper is.
but this would be a very dangerous task... and most likely would result in the death out the cpu.
and to confirm, i have a friend that works at amd and he says it would render the cpu useless if you removed the core.

[Yodums]

No Istari1, this is definitely Overclockers.com. Just that there's a difference between overclocking and stupiditiy. People are giving you advice which they see people killing their chips from lapping, chipping cores, with the addition of the AMD core being fragile. You can't even lap the core that far. If you see copper, kiss it goodbye. The only reason is to lap it with 2000grit - wet w/ the chip in an anti-static bag, only to take out the lettering doesn't even make it flat. Do it if you wish, but if it takes you this much to understand what were trying to say, then so be it. I was one of those people who got a chip killed because of a chipped core.

Yodums

[Istari1]

Originally posted by kendan
Well after you pop the core off and ruin your chip why don'y you head over to whodoibitchatnowthatikilledmychipanddidnotlistento theoverclockersatoverclockers.com .

They will be able to help you deal with the loss

Cant go there anymore, they already banned me after my griping about the last heartcore I un-solderd then tried to reassemble. Guess I'll just have to whine to you guys I think I'll lap the core while just to make it more interesting

Josh

[Kendan]

Originally posted by Istari1


Cant go there anymore, they already banned me after my griping about the last heartcore I un-solderd then tried to reassemble. Guess I'll just have to whine to you guys I think I'll lap the core while just to make it more interesting

Josh

Just be very carefull use a very light touch and realise that there will probably be no noticible difference in temps especially if you are using the insocket thermistor to get your temps. Secondly please do not pop the core off it is not like a heatspreader on an Intel chip.

[The Coolest]

OH well, remember u have been warned, if u lap the core successfully then congrats but if not, dont come back crying to us

[HydroCool]

dont take offense to this, but lay off the crack..anyone that would do that would officially be rbanded the stupidest man alive

[Istari1]

Originally posted by HydroCool
dont take offense to this, but lay off the crack..anyone that would do that would officially be rbanded the stupidest man alive

ROFL, I will try Hydro but since methadone didnt work for me I'm all out of options. If I fry the chip then so be it, there are calculated losses when doing anything. No a days an XP 1900+ wont even run me $200 so the risk isnt huge (and just to stop the inrush of replies..NO I dont have $200 to give you).

Josh

[MadMan007]

The whole point is to make it flat, right? And you want to lap it because you 'heard' that the cores can be concave. Well, instead of going off and *assuming* it is concave before potentially destroying it, why don't you check?

I see you go to NC State, I am sure you could find someone with a lab-quality straight-edge; hold the CPU with the straight-edge up to a light and see if any light seeps through between the straight-edge and core. Heck, you might even be able to find a prof who could let you use some high-quality engineering test equipment to check.

Oh, just saw your post above. When I went to college I didn't have $200 to throw away on an 'experiment' either. If you do, great.

[Istari1]

Good idea, i was planning on checking the flatness of the core, although I dont know any of the real engineering prof since I'm CSC, we dont even have access to the machine shops . I have some high quality straight edges though, and I will check. Yeah $200 isnt pocket change to me either, but I just got my tax return back and I wait tables about 25 hours a week so if I need to buy a new chip I can always just pick up some extra shifts.

Josh