Remarked 486SX?

tlccomp · Posted: Thu May 11, 2006 4:55 pm Post subject: Remarked 486SX?

Glad to have found this site... lot's of information here.
I have a few of these remarked cpu's. They looked like they were etched and remarked. It's hard to see but I can see at one time it was an SX-20.
Visible letters on the cpu (top) A864486SX-25 SX693 and the bottom I © © 1989 1223225W. On the back side the markings are 92042813CA USA Z 13

Any ideas?

Cpuswe · Posted: Thu May 11, 2006 5:08 pm Post subject:

Nice chip!

Hmm, never seen or head about one before. (Have seen a few when looking for chips for this project http://www.cpuphotolibrary.com/cat343.htm )

The pics does not help much since they are out of focus, are you sure its A864486SX-25 not A80486SX-25?

Edit: Welcome to the forum by the way!

tlccomp · Posted: Thu May 11, 2006 5:25 pm Post subject:

Cpuswe · Posted: Thu May 11, 2006 5:36 pm Post subject:

Just brainstorming here, could it be some sort of cachecontroller?

Like this but for the 486? http://www.cpu-world.com/forum/viewtopic.php?t=3735

VIA · Guest

hi... it might be for a cachecontroller.... cos i hade a cachecontroller for a IBM rack server ones it was a 2x DX2 50MHZ and they was remarked as 66MHZ

Cpuswe · Posted: Tue May 16, 2006 11:14 am Post subject:

Got the chip! Seems like it is an "ordinary" remarked SX-20 after all.

Since the s-spec is not known at cpu-world i would say it is pretty rare...

Any one else seen one?

gshv · Joined: 01 Feb 2003 Posts: 7898 Location: Fairfax, VA USA

I've never seen one like this before.

I'll add s-spec to the s-spec database in the next few days.

Gennadiy

Mixeur · Joined: 06 Jan 2005 Posts: 4038 Location: Sochaux, France

It is a really big remarking !!!
Usually, only one line is erased, but here, it is everything !

FDIV · Joined: 12 Mar 2006 Posts: 740 Location: Ohio, USA

Here is my guess. Since the remarks I have seen usually don't even erase but just add another marking and only sometimes x out but don't really keep you from telling what was originaly their there must be a reason for completely hiding it. I think the reason was that it was an es chip and intel dosen't sell es chips. I noticed that it was a made in usa chip and not all that many intels are. I can't recal in my limited experiance seeing a 486 this recent being made in the usa. Only some of the old logo dx's were. I think it was once an es chip.

CPUShack · Posted: Wed May 17, 2006 1:43 am Post subject:

the remark date is 223
the covered up one is 216 I beleive
I highly doubt its an ES as it says SX406 under the black.

JAC · Joined: 24 Jul 2005 Posts: 3469

The post of the back of the cpu in the auction thread is a different cpu. This is not an es.

As for USA / Malaysia, there are quite a few 'USA' 486's out there.

FDIV · Joined: 12 Mar 2006 Posts: 740 Location: Ohio, USA

yea, if it has a normal sspec visable through the black that pretty well settles it.

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