Using the older Sandisk Extreme III 16 gig CF card at speed rating at 30 MB/s.
This is all high speed shutter shooting mode.
126 Fine Medium jpeg Tested once all around 3mg files no slowdown in buffer
115 Large Jpeg Tested once all around 5.8mg files no slowdown in buffer
7 Raw + Large fine 2 times tested same Result
15 Raw 3 times tested same Result
10 med raw 3 times tested same Result
14 small raw /12 small raw 2 times tested
Real life samples, no i dont want to measure every file size and combo.
It is interesting how the buffer changed when going to med raw, must be more processing involved...
I'd say this 30mb/s speed card is plenty for most situations. I might buy something like a 32 gig thats faster in the future just so I am covered for extreme situations.
For shooting video I def would get like a 600x or 90 MB/s or faster card.