I've done this before too (wondered about the low number of frames before 'busy', that is).


Try looking in the menus for 'High ISO Noise reduction', 'Long exposure noise reduction', and i think maybe 'highlight tone priority' too. turn them all off.


also, only shoot RAW/mRAW/sRAW, it's the JPEGs that get all the fancy processing, make sure you're not shooting JPEG too.


If you must shoot JPEG, also look at the number in the bottom right-hand corner of the viewfinder, it should be in the hundreds, not single-digits.


.


if none of them, how fast MB/s is that CF card you're using?