You shouldn't have to replace your MB (That's big job) go to ebay as a guest and look at what graphic cards are available. or any of the web sites selling them I shoulnd't think you have to spend that much for a higher spec card. I've changed my card a couple of times without any problems, The type of 'slot' is important ( I think) Mine is fitted to a AGP slot whereas other fit a PCI slot. Mine is one of the Nvidea Geforce cards. p.s. It might be possible to increase your RAM size by adding extra, which might give you better speed. check your MB handbook