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Old November 26th 14, 12:53 PM posted to alt.comp.hardware.overclocking
Paul
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Posts: 13,364
Default Asus P5K Premium with Xeon E5472 and 771 to 775 adapter sticker??

~misfit~ wrote:
Once upon a time on usenet Paul wrote:
[snip]
So, we need an excuse for why it would get hot...

1) Heatsink isn't sitting flat on the CPU.

Or the TIM underneath the lid is defective - highly unlikely on
the LGA775 ones, as they used low temperature solder and the lid
s soldered to the silicon die. It's one of the best TIMs there
is (in terms of not being defective). Modern processors, like the
very latest Haswell, have switched back to "cookie dough" style
internal thermal interface material. Some flavors of cookie dough,
are not uniform from one section to another. Or even have voids in
them.

Intel switched from the low temperature solder (so they claim),
because the low temperature solder is a "conflict mineral".
I think they stopped using it, to boost the profit margin :-)
Solder is more expensive than the cookie dough they use.


This is really interesting thanks Paul. (I stopped reading tech / hardware
news / sites etc a while back as my financial situation went even more
downhill and reading about the latest stuff made me miss not having even
close to 'cutting edge' tech any more. Hi, my name's Shaun and I'm a
hardware junkie....)

I've got a socket 775 E7300 that's always had one core running around 15º C
hotter than the other. I spent quite some time messing with TIM, bought an
overkill cooler and even lapped the IHS and it made no difference. In the
end I put it down to bad TIM between IHS and die. I tried to remove the IHS
(like I used to with Tualatins when I was O/Cing them) but it didn't move
with as much force as I cared to exert trying. Now I know why.

Cheers,


One of the enthusiast sites showed how the users
there remove them. This is an example.

http://www.overclock.net/t/305443/ih...-and-the-facts

"The solder Intel uses roughly melts at 80-90c so it could take a while."

If that were true, boiling water would remove it :-)

http://www.legitreviews.com/intel-ih...775-cpus_402/2

"the extra solder on the core was scraped off using a plastic credit card"
"The system would power on, but sadly it wouldn’t post."

Just a small failure rate problem. Good if you start
with a bucket full of processors.

I like the lapping job they did on the lid in the second article.
They claim it only takes 20 minutes to do that, but if I was
doing it, I'd need to start with the belt sander, to be
able to finish off with 2500 grit in 20 minutes :-)

Paul