Fake CPU's?

MaxP779 · Joined: 08 Feb 2011 Posts: 24

I dont really understand fake cpus, but ive seen it mentioned a few times that a certain CPU is fake, maybe someone can answer my questions Smile

How do you identify one?

How do you get a fake CPU to begin with? These things need fabs and clean rooms and all that high tech manufacturing stuff right? Or is a fake CPU simply a lump of ceramic and metal dressed up to look like a CPU with no silicon die inside?

Is it that its not actually a fake CPU its just made by someone other than whats is printed on it?

jrmunro · Joined: 01 Feb 2003 Posts: 2842 Location: Vancouver, Canada

I`m no expert but usually it`s a cpu of lower frequency remarked to a higher one or as in Amd chips had bridges changed also.

CPUShack · Posted: Sun Feb 13, 2011 5:49 pm Post subject:

yup, usually they are remarked as a higher spec.

Sometimes its a completely different chip marked to something else.

Other times it is a empty package (no die) marked as something else

naked1300 · Joined: 26 Jul 2007 Posts: 665 Location: Austria,

http://www.cpu-galaxy.at/Article/fakes.htm

Neon_WA · Posted: Sun Feb 13, 2011 7:54 pm Post subject:

Chook · Joined: 29 Oct 2008 Posts: 1555 Location: Australia

Ceramic fakes such as 486 and Pentiums were usually made by grinding down the top surface of the chip to remove the old engraved markings and then engraving new markings on them - eg grinding down a 486DX2-50 and then engraving it as a 486DX2-66.
In most cases they are easily noticable as the fakers rarely got the font of the engravngs exactly the same as the original. The grinding is uaually evident too as the chip is slightly thinner than it should be and lacks the chamfered edge. Fakers often had the wrong dates such as the die date being later than the package date (should be the other way around) and sometimes even had the sspec wrong.
Although what I just said makes it seem easy to spot fakes, you usually have to be a cpu collector to pick up the differences. I had some fakes in my collection for ages before they were pointed out to me!

WFS2005 · Joined: 13 Mar 2007 Posts: 659 Location: HB£¬China

I have a SU046 too, lol

MaxP779 · Joined: 08 Feb 2011 Posts: 24

Ah so its the ceramic ones i need to watch out for.

CPUShack · Posted: Mon Feb 14, 2011 2:55 pm Post subject:

oh they fake plastic ones too lol

Cpuswe · Posted: Tue Feb 15, 2011 5:22 am Post subject:

I have a category on chipdb.org for fakes. They go for anything, not only ceramics Smile

http://www.chipdb.org/cat------fakes------1.htm

CPUShack · Posted: Wed Feb 16, 2011 1:49 pm Post subject:

and its not just fake CPU's
http://www.autoblog.com/2011/02/16/report-counterfeit-parts-overwhelm-china-include-fake-airbags/

Here the fakers put people lives at risk. Well done idiots.

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