Is there a way to know the wafer position of an intel chip??

flashstar · Dec 15, 2013

I´ve recently bought an Intel i5 4570 and i just read somewhere in the internet that the number on the chip (four digits) determines the position of the chip in the wafer it was produced being lower numbers closer to the center and thus less prone to contamination. Mine has over 4000 so it´s very high and to all that, the warranty of my vendor is only 6 months.
I didn´t find more information on the internet to confirm this, so I want to know if anyone knows if this is true at all, thanks

Someone Somewhere · Dec 15, 2013

By my (admittedly not certain) maths, a 300mm diameter wafer should hold about 399 177mm^2 dies. No way you can get four thousand on one wafer. The new 450mm wafers don't seem to be out yet, but if they were, they'd fit ~900.

oczdude8 · Dec 15, 2013

They are all the same. Intel has pretty good clean rooms and I don't see why the ones in the center would be cleaner....

also don't be worried about your cpu. It will last far longer then any component in your system.

unksol · Dec 15, 2013

I highly highly doubt that's true, but its irrelevant. If it were "contaminated" it would not work, would have failed testing, and wouldn't be sold. CPUs that are sold almost never fail due to manufacturing defects. It either works or it doesn't. Intel has a 3 year warranty on boxed processors anyway, and there's nothing you can do about a number on a chip. Don't worry about it.

Someone Somewhere · Dec 15, 2013

I'm guessing he's talking about OC potential. However, as above, Intel does have very good clean rooms. If there's variance, it's generally due to random effects and not contamination.

flashstar · Dec 15, 2013

I also doubted it was true since i searched several times fot this in google and I couldn´t confirm the relationship between wafer position and that number on the chip, and if the wafer position would be an issue, which i did find it could be, I don´t think Intel would be fool enough to drive its consumers schizophrenic by explicitly showing it. I just wonder what those four digits on the chip could mean, it´s not the batch number nor production date

Someone Somewhere · Dec 15, 2013

What are the numbers? I'd assume it's a serial number, e.g. chip 4567 of a particular batch.

flashstar · Dec 15, 2013

it´s printed on the very edge of Intel´s chips, it´s not shown in the box, indeed it might be a random serial number, the numbners i´ve seen on recently launched chips vary from 0062 to 4450 in my chip but it´s difficult to see once the chip is installed, only Intel knows

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