different sites/different manufacturers have different speeds for the fx series and i cant seem to find the info from nvidias site, all they have is ramdac and memory bandwidth no speeds.

5200
250mhz core / 200mhz memory (400ddr)

5200 ultra
325mhz core / 325mhz memory (650ddr)

5600
325mhz core / 250mhz memory (500ddr)

5600 ultra
400mhz core / 400mhz memory (800ddr)

5700 ultra
475mhz core / 450mhz memory (900mhzddr)

5800 ultra
500mhz core / 500mhz memory (1ghzddr)

5900
400mhz core / 425mhz memory (850ddr)

5900 ultra
450mhz core / 425mhz memory (850ddr)

5950 ultra
475mhz core / 475mhz memory (950mhzddr)

so from this is it safe to say in terms of an fx card the best bang/buck is the 5700 ultra even though it only has a 128bit bus?