sli gtx 660 on mac pro 3.1

[cruzer94]

Hey guys, i have a mac pro 3.1 early 2008 with gtx 660, now i have another 660 and i want to connect in sli this 2 vga, is possible? beacuse when i connect all with the nvidia sli bridge, the system (mac and windows) not recognize me the sli and use 2 vga apart.
Thanks for yours answers and sorry for my bad english

 

[hang-the-9]

I have never seen a MAC with the SLI option on the motherboard.