Graphics card Vs Memory and scrolling speeds

Hi All

Although my quetion is not specifically related to vb6, I am using vb6 for my application.

My application displays different images on ten display screens and scrolls the images ( in images controls ) up the screens.

My PC has 5 dual video cards ( giving ten vga outputs )

Each nvdia card is quoted as having 64MB of memory ( not sure if that 64Mg for both the outputs or 64Mg for each of the two outputs )

My problem is when all ten screens are scrolling ,the scroling of each screen slows down, IE the more scrrens are on and scrolling, then the slower they all scroll.

I suspect and hope someone can confirm ( before I spend loads of my hard earned dosh ) that what I need are video cards with more memory, or is it that I need more than the 4gig of computer memory that I currently have ?



Any advise more than welcome

Thanks

Dave