The above sounds close to the one I got from someone who got them from Computer Reset. Mine has some hand written part numbers on it. My expansion card only seems to detect 192kb of memory.
when I run the IBM advanced diagnostics memory test, I get error 030201. I've replaced that module and moved others around in that bank but still get the error.
Does yours do the same?
Finally got around to replacing the tantalum caps and installing it. The AT Diags and Check It both claim 256K, and it checks out OK. So good news is, the card itself appears to be sound. Bad news is, apparently you've got some more troubleshooting to do. ;-)