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lapping a naked 939 AMD Athlon64 X2 Die..??

post #1 of 31
Thread Starter 
hii OCN Citizens...

lately i have delidded my athlon X2 Dual core as i was expecting a bump for my OC , pairing it with a TR Ultra 120 Extreme Rev C.

As usual i recieved the "120 Extreme" with a concave base. So i decided to lap the base and ended up with a perfect flat shiny surface. After 4 hours of laping work i jus thot of placing the processor above the Tru'es[Placed Up-Side Down] base whthr to see if any lights were peeping thru it.

tbh, i was shocked to notice the light rays coming in between.. means this time the X2's die was not perfectly flat but concave. So is my all 4 hrs laping job utter useless..??

So iam seriously thinking of lapping the die tooo..?? But iam a little upset as i even i have never heard of it before..

but i know some of u ppl can shed some light on my thot ..

thanks in advance ..

-JamY
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post #2 of 31
I believe that even a delidded athlon processor still have a layer of copper on top of it, because exposing the bare silicon would be problematic. Can't say I know how much of a layer it has though. You might shave off to much and then end up cracking the actual silicon die. Your best bet might be to put the lid back on and lap it instead.
post #3 of 31
as in no heat spreader naked and want to shave off the core? no no no no no no no.
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post #4 of 31
I chipped a tiny corner off my opty die and its stopped working, so i would not recommend lapping it.
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post #5 of 31
Thread Starter 
Quote:
Originally Posted by waqasr View Post
I chipped a tiny corner off my opty die and its stopped working, so i would not recommend lapping it.
oh no !! even the tiny corner of it is already chipped. But glad that its still working.. Too bad that its not strong enough. A tiny piece of it came out while i was wiping the thermal paste off..
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post #6 of 31
I lapped my opertorn 165 and athlon 3200+ and it worked out quite well. I didn't delid them though. i don't think that supported anything of the like.
post #7 of 31
Thread Starter 
Quote:
Originally Posted by mothergoose729 View Post
I believe that even a delidded athlon processor still have a layer of copper on top of it, because exposing the bare silicon would be problematic. Can't say I know how much of a layer it has though. You might shave off to much and then end up cracking the actual silicon die. Your best bet might be to put the lid back on and lap it instead.
As i have an old dead athlon 64 delidded processor, perhaps i will make a trial of lapping it and see whthr there is a layer of copper or some thing lik that as u have mentioned.. I guess that would be the best Go !!!
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post #8 of 31
Quote:
Originally Posted by mothergoose729 View Post
I believe that even a delidded athlon processor still have a layer of copper on top of it, because exposing the bare silicon would be problematic.
VERY wrong! The exposed die does not have anything between its outer surface and the heatsink's bottom surface.

As others have already said, it is useless to lap the exposed core, as this will likely damage it beyond the point of repair.

JamY, the best remedy I can recommend is increasing the pressure of the mount. There are several ways you can do this, including my own "2 cent mod." I've used this technique for mounting a Ultra 120 Extreme (and other similar Thermalright heatsinks) on naked chips.

Good luck!
    
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post #9 of 31
Thread Starter 
ok txtmstrjoe, i will defintly look in to ur "2 cent mod" and will post the result later.

But can too much pressure cause damage to the core or wolud likely kill the CPU..??!?!

And thanks for gving the Tru info that there is nothing in between die and the base..
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post #10 of 31
JamY, just as long as you don't over-torque the spring-loaded bolts on your mount (to the point that the mount is flexing the CPU socket portion of the motherboard), you're okay. On my DFI and ASUS S939 boards, it was okay to tighten the bolts all the way down to their limit; the boards did not exhibit any flexure whatsoever.
    
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