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TI486SXLC2 66 G50 PQ?!

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First post, by GenkiMan_Lx

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Hi,
I was looking for another SXLC2 for a IBM PS/2 and found this:
https://www.ebay.com/itm/366250192313?_ul=PT

Bought one and received it but instead of 50 it has 66 despite being a G50 and i don’t have the spare time to solder it to the motherboard and test it.

I used a cotton tip with alcohol and everithing looked legit.

Does anyone have this CPU to confirm if it is a genuine TI486sxlc2 g50 pq?

Reply 1 of 3, by keropi

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This is typical lasered/remarked Chinese part... Might be fine might not be, only way to know is to solder it...

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Reply 2 of 3, by GenkiMan_Lx

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keropi wrote on 2026-03-23, 22:13:

This is typical lasered/remarked Chinese part... Might be fine might not be, only way to know is to solder it...

I thought the same. But the back of the chip looks like the one shown on CPU World:

https://www.cpu-galerie.de/assets/images/TI48 … 0-PQ-PQFP-R.jpg

Top left- Philippines
Bottom left - A2
Bottom right - M3

Reply 3 of 3, by MikeSG

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A lot of people have problems double clocking them at all.

Out of two TI486SXLC2-50 chips I tested. One I only tested at 66Mhz and was totally fine. Another at 80-100Mhz and was fine. At the full 5V though, not 3.3v.

If they all were reproductions on modern process nodes I'd believe it.

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