How do I know what type of Gateway DX computer I have?

Okay, I am a computer moron. I have a Gateway series DX computer (It says so on the case) but I don't know which of the long list of models of DX computers I have. (see http://support.gateway.com/product/?cmpid=supportnav )

when I right-click to see properties of the computer I get this info

Model RS780 (which i believe is the motherboard)
Processor AMD Phenom 1900e Quad-Core processor 1.8Ghz
Memory 4.00 GB
System Type 64 bit O.S.

I am trying to determine what kind of memory I should get if I get more, and if I can figure out what kind of slots I have for maybe a new video card.

Yes I know it is old and not that great...I spend all my money on OTHER toys

Anonymous2011-09-17T15:23:30Z

Favorite Answer

Look on the back or bottom for the model number.