The GTX 560 Ti is not natively supported by Adobe in the GPU accelerated mode. Fortunately, there is a "hack" to enable such support with your card. Open the cuda_supported_cards.txt file and then add the line "GeForce GTX 560 Ti" to the list, then save the file.
Thanks, I was under the impression it is natively supported, good to hear about this "hack".
I'll try it when I'll get back home and report later.
When you open up the cuda_supported_cards.txt file in the Program Files\Adobe\Adobe Premiere Pro CS5.5 folder, you will find all of the cards that Adobe natively supports in CS 5.5. They are:
GeForce GTX 285
GeForce GTX 470
GeForce GTX 570
GeForce GTX 580
Quadro FX 3700M
Quadro FX 3800
Quadro FX 3800M
Quadro FX 4800
Quadro FX 5800
For your GeForce GTX 560 Ti, you simply need to add that card to the list.
Worked liked a charm.