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National Semiconductor NS486SXL-25

National Semiconductor NS486SXF-25

National Semiconductor NS486SXF-25

National Semiconductor NS486SXF-25
Notes:This chip has been around as a ES chip but the ES marking is most certain a internal code and does not stand for Engineering sample. Check this thread at with photos of a real NS 486 ES
Date: 12.04.2006 09:42
Photo contributed by:

Author: Comment:

Join Date: 20.03.2006
Comments: 6

This IS NOT an ES. When I posted the pic I did not declare it to be ES, and I ahve on a few occassions on CPU-WORLD also declared that it is NOT, which has been backed up by a picture of a genuine ES version. Please do not consider the information here as accurate until the site admin have removed the ES comment...
03.05.2007 16:05 Offline debs3759 debs at

Join Date: 28.09.2011
Comments: 0

Thanks debs!

I have removed the ES reference and added a note about it and a link to the thread at

04.05.2007 14:18 Offline admin admin at

Join Date: 28.10.2006
Comments: 7
possible ES

as a pentium Qspec ES without "intel confidential" or without "sample" will not become nonES just because there is a pentium Qspec ES with "intel confidential" or because there is intel chip with "sample"

One cannot prove a NS486 ES without "sample" is not ES just because there is a NS486ES with "sample"
02.06.2007 10:16 Offline lither lither at

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