Okay, sorry about that.
I bought a fresh 512 stick of ram, put it into my computer, and started it up. When the bios first clicked it, it displayed 256 mb ram. When I check the system summary it shows that indeed I do have 512 mb ram installed. My question to you is just why would 256 be displaying in the bios, but not in the system summary?
2.8 HT Processor
512 pc 3200 ram
GeForce 5600XT