Howdy:
What about speed?? It is very possible your system will only handle PC-100 ram and, if you put in PC-133, then it won't be recognized... Some older boards have this limitation and alot of the newer PC-133 ram is NOT backward compatible !!! Also, if your system takes PC-133 ram and you installed PC-100, then that wouldn't register either..
Last, but not least, you make need a BIOS update in order for your BIOS to recognize anything over 128megs per slot..
Murray