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>OK, maybe I've missed something, but, >according to Ohm's law, If a circuit is designed for 5 volts (like the >card in question) and 3.3 volts are applied to it (you said the socket >is designed for 3.3 volt cards) then the card should draw LESS current >than a card designed for 3.3 volts! Has IBM become so big and powerfull >that it can repeal Ohm's law??? ;-) Did I miss something? it's actually the power that the memory upgrade sucks. Power= Current * Voltage since the memory module is rated for 5volts, and it's power requirements are constant, you'll find that if the voltage drops to 3.3 then the current drawn will be higher (5/3.3 times, to be exact) than normal. this has nothing to do with ohm's law. sam