The RAM on a video card is completely independent of the motherboard. It doesn't matter if a video card has DDR2 or DDR5 RAM.
But my problem is: is there a way to get full hd or hdmi/dvi port through a video card (or any other method) as i only have dsub/vga port on my asus m5A 78L-M LX mobo?? Also is upgrade to usb 3.0 possible on this mobo and if so then how? Please can you address these two main questions?? A reply would be much appreciated.