You gave a chipset number instead of a model number. I checked out some of the cheaper ASUS boards for 775 socket and they are PCI-E 1.0. Video cards are backwards compatible however but will only have the equivalent bandwith of a PCI-E x8 2.0. That's not really a big deal since it will only be a few fps penalty with even the most expensive graphics cards. Anything in the $150 range won't be eating up all the bandwith though. What's your graphics card budget and the actual model number of your ASUS board? It should look something like this ASUS P5L-MX Intel 945G.