Determining the maximum RAM I can upgrade my PC to and what type
Without opening the computer, how can I determine what kind of RAM to buy?
I want to max out my RAM to get a cheap and simple performance improvement. I know I'm running a 32-bit OS and upgrading to 4GB will only give me 3GB, but I could consider going 64-bit later on so I really do want 4GB.
I've got the machine specs sort-of but not so precise that I can deduce the exact RAM format. I know I've got 4 slots, 2 of which are in use with 1GB in each.
I could open the machines (there are two different machines), count the pins, photograph the RAM sticks, and post everything here -- but I'd rather not unplug and open the machines because they're tucked a bit out of the way. I know I need to open the machines to install the RAM anyway, but I'd prefer to open them only once.
Is there another way to identify the RAM precisely enough to be able to order more RAM based on that information?