I have a Nikon D7100. I have set it up to right raw to card 1 and jpeg to card 2. I photograph birds quite often and we all know how fast they can be. I have been using SanDisk Ultra's which are class 10, 30MB/s cards. I shoot birds in the Continuous High shooting speeds and it takes approx. 20 seconds to free up the buffer for more shots. If I go with a faster write speed card for card slot 1 do I also need the same speed card in slot 2 or does it matter? I am assuming it won't matter since the jpegs being written to card 2 are so much smaller than the raw being written to card 1.

Thanks for your opinions.

I have the same camera and the same problem. Doing anything with slot 2, other than just overflow, is not going to help performance. But as they say, YMMV, so try that as well. Get the fastest cards you can get ( Extreme Pro 95MB/s ) and dump the raw while doing continuous. You'll get the higher fps, but not for long but it will be faster than with raw.

This is something that really irked me. It feels as if Nikon purposefully kept the buffer size small to prevent sustained high fps.

I have a Nikon D7100. I have set it up to right raw to card 1 and jpeg to card 2. I photograph birds quite often and we all know how fast they can be. I have been using SanDisk Ultra's which are class 10, 30MB/s cards. I shoot birds in the Continuous High shooting speeds and it takes approx. 20 seconds to free up the buffer for more shots. If I go with a faster write speed card for card slot 1 do I also need the same speed card in slot 2 or does it matter? I am assuming it won't matter since the jpegs being written to card 2 are so much smaller than the raw being written to card 1.

Thanks for your opinions.

I have a Nikon D7100. I have set it up to right raw to card 1 and jpeg to card 2. I photograph birds quite often and we all know how fast they can be. I have been using SanDisk Ultra's which are class 10, 30MB/s cards. I shoot birds in the Continuous High shooting speeds and it takes approx. 20 seconds to free up the buffer for more shots. If I go with a faster write speed card for card slot 1 do I also need the same speed card in slot 2 or does it matter? I am assuming it won't matter since the jpegs being written to card 2 are so much smaller than the raw being written to card 1.

This weekend I went to BestBuy, I wanted a bigger CF card. They had a SanDisk 32K @ 90MB for the $20 less tat the 16GB SanDisk CF. I used it as my primary, with the 16 ig CF in the camera as overflow and shut off JPG. It worked well. If I really needed quick JPG. Bridge can do that quickly. Long time ago I stops taking the JPGs off the camera and just used RAW, This was just the final step in that process. SO now I am not writing two pictures, but one at a higher speed. I may switch the JPG back on the CF just for backup.

Thanks for your opinions.