The personal computer memory card internal association, or PCMCIA, slot on a computer enables a user to add additional hardware to a laptop, similar to the peripheral component interconnect slot ...

Different versions of memory have a notch in a different spot preventing insertion into incorrect slots. A DDR3 supporting motherboard will work only with DDR3 RAM: a DDR2 module will not work.

A memory upgrade's the best way to speed up that slow computer, but the RAM stick aisle at your local computer parts retailer is a cold and scary place. A little pre-research is in order: the How ...