mx4000 is basically mx440 with slightly boosted clocks and agp 8x support. Same core(dx7), same 64bit interface. 9200SE is a never part, based on 8500, so it supports dx8(mx doesnt), but still has 64bit interface. I'd suggest at least 9200 vanilla or 9550/9600 nonpro cards(dx9), because 64bit memory cripples the performance horribly