Thanks to the higher core/memory frequency, R9800XT is around 5~11% faster than an R9800Pro in benchmarks. The R9800XT truly shines when comparing with Nvidia's flagship, FX5950Ultra. The FX5950Ultra's performance is on par with R9800XT at standard setting; however, ATi's R9800XT takes a commanding lead (up to 40%) when FSAA is enabled.



Link: OCNZ