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Mid Atlantic Cyrix CXr486SRx² 386SX to CX486SLC 20/40MHz snap-on upgrade for surface mount CPU - $100-200?

Covers: New York, Pensylvania, New Jersey, Delaware, Virginia, Maryland and Washington DC.

thisisamigaspeaking

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Joined
Feb 13, 2024
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I got a PS/2 55SX (1988 BIOS) with one of these installed and the system would not post. Turns out these are only compatible with 1991 and later 386SX-16 or -20 boards so it will not work on a 1988 386SX-16. As far as functionality, all I know is that when it was installed it put off heat like it was working. I will include the original green heat sink that this came with but you will need new tape.

Cyrix.jpeg

55SX.jpeg


As to price, I do not exactly know what this is worth. I know this is fairly rare. Judging from eBay listings for similar types of items I am guessing the $100-200 range but you tell me what it is worth to you. More worried about this going to a good home than how much I get for it.

Please consider this AS-IS, AS PICTURED, NO RETURNS. Ship to USA only, at buyer's expense, payment with PayPal. Please have a few posts under your belt on this forum, or pay with "Friends & Family" on PayPal.
 
Hi, I am interested as I have an IBM ps/1 386sx 20 mhz I would like to try this cpu on.
 
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