I'll soon be upgrading from a Radeon 9000 pro to a 9800 pro in anticipation of Doom3 and HL2. Right now, i'm running a 2.4 ghz p4 on an intel board that only supports up to 4x agp. I plan on running Doom3 as pretty as possible. Is 8x worth the 150 bucks to buy a new mobo? Will the 9800's throughput ever max out that of 4x AGP?