I'd guess that the 50 MB/s is a reference to the
PCI-PCI DMA access speed in case you are eg DMA'ing from
an ethernet board to the videoram of a PCI gfxboard.
Not that I see the actual use for it but the theoretical
figure is correct. Now you just have to figure out what
you can do with ethernet frames residing on the gfx board
without beeing to access them by the cpu at that speed
regards,
Stefan
