If the mobo supports 4X then a 4X/8X card should run at 4X. Such a card will not keep up with the latest games if that is what the upgrade is for. An 8X card won't keep up with the latest games. Dave Penksa <[log in to unmask]> wrote: >I am planning to upgrade my son's video card. His system currently supports AGP 2x/4x. All the higher memory cards are AGP 4x/8x. Will I be able to install one of these cards in his AGP slot? >Thanks > > > __________________________________________________________________ Switch to Netscape Internet Service. As low as $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com