Re: lapped CPU for better cooling?

Allen Drake wrote:
On 1 Jan 2012 03:55:39 +0100, "Orson Cart" <ex-privat@xxxxxxxxx>
wrote:

I saw a Core 2 Quad for sale online, with the heatspread
lapped for better cooling. It has been machined right down, so
you can't read any numbers.
It is a Q6600, but the seller claims it overclocks to 3830 MHz
with this butchering. That would be 11.5 x 333 MHz ... hmmm
do you believe it?
How would this be so much better than a thin layer of silver
heatsink paste?
Lapping would be done to restore surface fatness which might have been
distorted from over heating. Then polishing would be the next process
to increase conductivity. I would stay away from something like that.
The process of polishing would be enough to remove the engraving and
to admit the device was lapped seems to be telling.

Here's an article from that time period.

The lid on the Core2 was known to not be flat.

http://www.legitreviews.com/article/402/1/

Some decided to remove the lid entirely, for fun. And
there were a few who succeeded in having a perfectly
good working processor afterwards. The lid is soldered
to the surface of the die with a low temp solder. In that
legitreview article, they used a blow torch, and perhaps
that's just too strong a heat source for the job. A hot
air gun might be enough.

Paul
.