Can you enlighten on the best set up to obtain the 6fp/s ratio
I presume it slows down the rate if you choose Raw + backup to SD card? or Raw + Jpeg?
I am not sure how the MK3 works in this regard. If the setting involves writing to two different cards than you are bound by the slower of the two cards. UDMA 7 only applies to CF cards. So if I was to test sustained 6 fps on my MK3 I would try it with my UDMA 7 16GB Lexar card. If the images are 25MB in size it should be able to sustain 6 fps until the card is full (not that I would do that). But my guess is at the full resolution the MK3 RAW files will be much larger than 25MB. So it will likely go down to 5 fps.