CPU Lapping #2 (with shocking pics)

[CBird28]

check this pic out, its what my e8400 looks like after my pump broke, reaching almost 100c no joke
http://img241.imageshack.us/img241/3250/dsc00061rn7.jpg (http://imageshack.us) Right now its running at 46/47c with a room temp of 19c. with no OC, 1.19v. 56/57c after 5 mins load
http://img244.imageshack.us/img244/3525/dsc00069ey7.jpg (http://imageshack.us)
http://img244.imageshack.us/img244/4808/dsc00055bs1.jpg (http://imageshack.us) It wouldnt cause any problems if i lapped it again would it?

[DAK1640]

If it were me, I would re-lap it...I have re-lapped several cpu's :up:

[Solarfall]

im pretty sure your safe to re-lap it.. damn your cpu block looks pretty toasted maybe you should lap it too or maybe try first with vinegar if your able to get that tarnished area clean again..

[CBird28]

no im buying a new block, D-Tek FuZion V2

[Lloyd]

Nightmare!
I don't see any reason you can't lapp it again.

[snipper_cr]

Yikes... thats scarry!
Relapping should be fine. As most people say, CPUs can be lapped several times.
Is it possible to add a shutdown feature incase your pump fails (knock on wood) again? I never had one but when water cooling, i set my motherboard to shutdown at a rather low temp (highier than full CPU load ever got) incase radiator fans OR pump failed. One motherboard I had didn't have built in shutdown so I had to use a program that issued a windows command forced shutdown (shutdown -s -t 0 -f -c "High Temp Shutdown").

[zsamz_]

relap it

[CBird28]

im wondering if it will get rid of the colours where the metals overheated???

[zsamz_]

im wondering if it will get rid of the colours where the metals overheated???

who cares about color just make sure its 100% straight

[tiro_uspsss]

pic aint working :(

[Rickpatbrown]

Relapping shouldn't take much metal off. Your just taking the very top layer off of an already flat lid.

What happened with your pump? This is one of my biggest worries with water. I guess that a fan can fail on an air cooler too, though.

[DaMulta]

Relapping shouldn't take much metal off. Your just taking the very top layer off of an already flat lid.

What happened with your pump? This is one of my biggest worries with water. I guess that a fan can fail on an air cooler too, though.

This is why there is a temp shut down button in your motherboard bios:up:

[WhiteFireDragon]

wait the aluminum surface turned orange??

[Oberon]

wait the aluminum surface turned orange??

The CPU IHS is copper, just plated in a different metal, AFAIK. :D

[LuckyNV]

wait the aluminum surface turned orange??

the grey IHS is actually tin plated copper, since he already lapped the IHS, the tin is gone

edit - nickel not tin, ty :)

[celemine1Gig]

the grey IHS is actually tin plated copper, since he already lapped the IHS, the tin is gone

Nickel, not tin. ;) Just have a look at one of the cpu datasheets. It explicitly states the materials used.

And BTW, I don't really understand the whole "this is so shocking" part here. All this because of a little copper discoloration due to the TIM getting hotter than usual. Just a small chemical reaction between the TIM and the pure copper. Nothing more, nothing less. So, no need to worry. As already said, now you know that the shutdown temp is there for a reason. :)

[LuckyNV]

Nickel, not tin. ;) Just have a look at one of the cpu datasheets. It explicitly states the materials used.

And BTW, I don't really understand the whole "this is so shocking" part here. All this because of a little copper discoloration due to the TIM getting hotter than usual. Just a small chemical reaction between the TIM and the pure copper. Nothing more, nothing less. So, no need to worry. As already said, now you now that the shutdown temp is there for a reason. :)

my bad, I knew it was nickel, even my TRUE is also nickel plated, no idea why "tin" came out :confused::p:

[tiro_uspsss]

my bad, I knew it was nickel, even my TRUE is also nickel plated, no idea why "tin" came out :confused::p:

'tin' is 3 key-strokes, 'nickel' is 6 - admit it, u were feeling lazy! :p: :rofl: :up:

[bt_medic04]

why re-lap it? its just discoloration. things are still as flat as they were before the pump died. you lap an IHS to make it flat, not to turn it into a mirror

[FattyTW]

wow shocking! good luck on making it nice back again, haha

[Rickpatbrown]

I don't think that my MB has CPU shut down temp.

I think he just doesn't like the discoloration. Same reason guys lap their CPUs to be shiny. They want it to look nice before they cover it up with a heatsink where no one will ever see it.

[celemine1Gig]

Of course it doesn't look that good and it even degrades thermal performance (less than a percent if my guess is about right). Just relap it and it should be absolutely fine. Those things can take more temperature and other torture than you might imagine.

What they nearly never like though is rapid changes in any parameter, be it temp, voltage etc.. ;)

[bt_medic04]

it even degrades thermal performance (less than a percent if I my guess is about right).

what data do you have to base this off of? other than the color of the IHS, nothing else has changed. the discoloration is from the high temps that occurred when the pump failed. its not corrosion like you would see on a waterblock or radiator thats been sitting out with moisture still within it. had the discoloration been cause by corrosion, then i would agree with the above statement.

as it stands, this part of your statement is false. look at the third picture he posted. the ram slots in the reflection are perfectly lined up with no distortion on the IHS that would indicate that it had warped during the high heat load. had the IHS warped, im fairly certain the processor would have died from that amount of heat.

sure, its not as shiny as it once had been, however discoloration caused by high temps does not affect how flat the IHS is.

[celemine1Gig]

what data do you have to base this off of? other than the color of the IHS, nothing else has changed. the discoloration is from the high temps that occurred when the pump failed. its not corrosion like you would see on a waterblock or radiator thats been sitting out with moisture still within it. had the discoloration been cause by corrosion, then i would agree with the above statement.

You did read this, right?

Of course it doesn't look that good and it even degrades thermal performance (less than a percent if my guess is about right).
As I said the discoloration is from a chemical reaction of the copper surface and the TIM. I never said that it would be something to worry about.



as it stands, this part of your statement is false. look at the third picture he posted. the ram slots in the reflection are perfectly lined up with no distortion on the IHS that would indicate that it had warped during the high heat load. had the IHS warped, im fairly certain the processor would have died from that amount of heat.

sure, its not as shiny as it once had been, however discoloration caused by high temps does not affect how flat the IHS is.

What are you talking about? Did I ever state that the copper must be warped now due to the high heat? You come up with your own little story here man. Noone ever said anything about the IHS being warped. :shrug:

The discoloration is insignificant to the thermal performance and just looks bad. And theoretically it does harm the thermal performance, somewhere in the 10th of a percent range, due to the direct contact surface being covered by some oxidation or something like that. That's what i said.

Next time, read, understand and then try to post, please.

[bt_medic04]

i mis-understood your post the first time around, and was asking for some explanation on it. admittedly i should have asked in a different way and i apologize for that. staying awake for 26 hours doesnt help clarity of mind either in this situation. again, thank you for the clarification.

[tact¡cal]

i set my shutdown temp at 75c, it shutdown pretty quickly when my pump broke

[celemine1Gig]

i mis-understood your post the first time around, and was asking for some explanation on it. admittedly i should have asked in a different way and i apologize for that. staying awake for 26 hours doesnt help clarity of mind either in this situation. again, thank you for the clarification.

Absolutely no problemo. I know what you are talking about. I used to lack enough sleep for years, some time ago. Strange things happen if you need sleep, but then you just force your body to stay awake. :)
And BTW, my answer wasn't very polite, too. Sorry about that! I'm also a bit stressed out ATM, due to exams every few days.

IMHO bottom line to the topic is:
- CPU should be absolutely fine
- thermal transfer shouldn't be hindered by the small discoloration
- for the good feeling and the certainty it still can't hurt to just relap it
- as it is already flat, lapping will only take a minute anyway
- and last but not least, let's all thank the guy who came up with the idea of the shutdown temp for CPUs:up:

[CBird28]

lol im not botherd about how it looks i was just wondering if lapping would get rid of it the colours..

i want to try and bring them temps down a bit

[bt_medic04]

And BTW, my answer wasn't very polite, too. Sorry about that! I'm also a bit stressed out ATM, due to exams every few days.

its no worries bud :up: it was i that messed up in the first place. i would rather have the answer straight up and to the point rather than have something sugarcoated. you gave me the answer straight up, and i appreciate that :up:

good luck with the exams!

[celemine1Gig]

lol im not botherd about how it looks i was just wondering if lapping would get rid of it the colours..

i want to try and bring them temps down a bit

Yep, if you lap it again, you will get rid of the discoloration in no time. It's just a very thin layer on the surface. A minute and the CPU will look nice and shiny again as if nothing ever hapened. :) For the temps though, it won't help. The oxidation (or whatever it really is) is too thin to cause really bad temps. If you still have bad temps with a lapped IHS and a flat heatsink/waterblock base, then your only option is to remove the IHS to get even better thermal transfer, eliminating one thermal resistance (between IHS and CPU-DIE).



its no worries bud :up: it was i that messed up in the first place. i would rather have the answer straight up and to the point rather than have something sugarcoated. you gave me the answer straight up, and i appreciate that :up:

good luck with the exams!
Thx man, I really appreciate it.