we recently migrated to a Mac Pro based system (coming from Boxx).
Yesterday I spent the entire evening and night setting up a new Mac Pro 12 cores 2.66GHz using this PCI setup:
(from bottom up)
Slot 1 - Red Rocket
Slot 2 - nVidia quadro 4000
Slot 3 - eSata card
Slot 4 - Aja Kona HD-SDI
Checking the system details I see that slot 1 links the nvidia card with x16 link width and 5.0 GT/s link speed (slot 2).
On the other hand the red rocket card is linked with x8 link width and 2.5 GT/s link speed (slot 1)
I am not sure this is the right setup, any feedback is appreciated!