I personally own a D3 with 60mb cards and i have never had that problem. I use to have that problem when i shot on 30mbs a second card around 5frames a second for about 3 seconds so about 15-20 shots it would slow dramatically but i was shooting RAW. Now with the 60mbs cards i can go 20-30 consecutive shots. I shoot sandisks cards only

This seems quite odd coming a D3 user. Jpeg i could shoot off 90+ frames consecutively on jpeg fine if i wanted too. And no I do not own the buffer upgrade.

Just a question, do you reformat you're cards after every use? sometimes they slow down over time if you don't reformat them.

I don't remember the buffer on the D3 off the top of my head, but it should be deeper than 8-9 frames.

Do you have active D-Lighting or noise reduction on?

And don't worry about Canons, it's a different camera- why should it matter, it's not like they share any parts or menus?

I am shooting tennis and I am having issues with my D3 buffering and writing to the CF card. It seems that I am wanting images faster than the camera can write to my card.

I am shooting Extreme IV 60mb/s cards. I have also tried Transcend, Promaster, and Lexar cards as well.

My images are jpeg normal, size large, quality compression with a final image size of 3.9mb.

My camera is set for 10fps in FX mode.

As I run the shutter I am noticing that the clicks are slowing down and some times stopping completely at 8-9 frames. When this happens I stop shooting and allow the buffer to catch up.

The person I am shooting with is using a Canon EOS 1 Mark IV and is not having this issue.

Any info will help...Thanks