Help[details]? I currently have an ATI Radeon Xpress 200 series on my computer.I want an upgrade how do i know what upgrade wll work or what my motherboard will support u can send some suggestions or links to what kind of Graphics my com can hold

Hint:if this helps my MOBO supports DDR single channel Ram if that helps
also how do i determine what processor my MOBO supports
IM ASKING HOW TO FIND OUT INFO ABOUT THE MOBO SO I CAN SEE THE COMPATIBILITIES...