Magma Chassis Pci-e Compatible???

Im looking to buy a magma chassis its a pci chassis but i want to use it with my mac pro wich is pci-e and wonder if its compatible to upgrade with the new pci-e card? Model is: PCI13R Serial No: R13B2 03033 Thxs

I don't believe it's compatible or possible. My understanding is that you need the new DIGI "computer in a chassis" 6 slot-er to work with the Mac Pros.

The Magma Chassis' are not currently compatible with the Mac Pro. I just returned one to Magma and went with the Digi 6-slot. With a few exceptions (Altiverb 6 TDM) everything is working fine.

Is there any difference in performance when using a chassis vs. pci cards in the computer? i have a G5 dual 2 gig, PT HD3 6.9.3 OSX 10.4.2, I need more slots so am thinking of a chassis, does the 66bus vs the 33 make a difference too? thanks in advance to anyone who has experience with these.