Intel 486SX-25 also marked SX-33 ?

[JAC]

Hi,

I have an Intel 486SX that I need more info on please....

Chip markings on the top:

(white ink) intel (r)
(white ink) i486 (tm) SX (tm)

A80486SX-25
L4301938
&E5V1X SX903
INTEL(M)(c)'89'92


Then on the bottom, near the edge:

SX-33 SK903


I have not seen this before, can someone give me some more information please?

Thank you.

[gshv]

I didn't see remarked 80386DX-25 to DX-33 with S-Spec code SK903 and SX903. I know there was another remarked DX-25 to DX-33 with S-Spec codes SX798 and SK798:

http://www.cpu-world.com/CPUs/80486/pictures-Intel-A80486SX-25.html

It seems that this chip was remarked by Intel, which is probably the case with your chip too.

Gennadiy

[JAC]

Thanks for your reply.

And yes, it is exactly the same format of marking as shown in your
photograph. I wonder if it was done at the same time of manufacture, or if Intel had them remarked after manufacture.

I phoned a friend who collects also and he has one. So I suspect these are not that rare, or are they?


JAC

[gshv]

I saw a few of these remarked Intel 80486DX-25 processors in other people collections. They are more difficult to find than, say, 80486SX-16, but they are not as expensive as SX-16.

Gennadiy