lots of answers wowie, I'd like to thank you for answering, but here's the problem:
One of you just linked me to a bunch of 2gb and 1gb sticks
I'm not paying $90 for 4gb of RAM
I'm not a TOTAL moron, I know how 32 and 64 bit work, this PC is not mine, it operates on an Asus P5K-E motherboard. It maxes out at 8gb, and one of the slots is busted. The only way to reach 8 is to remove one of the three 2gb sticks and replace it with a 4gb.
Assuming what Shaun o said doesn't apply to this motherboard. I have looked around before, seems like most of it is that AMD only stuff. I'll dig through what you've all sent me some more, thank you.