I thought I would post this little bit of info that I found under Avid SupportingFiles/Config:

;=====================================================================================
;Copyright 2008 Avid Technology, Inc.
;All Rights Reserved
;
;This file contains the list of qualified GPU cards for both MAC & PC.
;=====================================================================================
;
;Description:
; - April 29 2008: UDevC00098019: Remove 4600 & 5600 from the list and leave only the 3700 for now.
;
;=====================================================================================
;NOTE: Qualified board must be described as: "Full_name : Vendor_name : Model_number".
;NOTE: Board description without full nomenclature is not registered.
;NOTE: You can get your board description with console command "acplgpueffects".
;=====================================================================================
;
PC_SUPPORTED_CARDS ; Token that indicates the start of the list of qualified cards on PC
;
;NVIDIA Corporation--Quadro FX 4600/PCI/SSE2 : NVIDIA : 4600
;NVIDIA Corporation--Quadro FX 5600/PCI/SSE2 : NVIDIA : 5600
NVIDIA Corporation--Quadro FX 3700/PCI/SSE2 : NVIDIA : 3700
;
;=====================================================================================
;
MAC_SUPPORTED_CARDS ; Token that indicates the start of the list of qualified cards on MAC
;
;NVIDIA Corporation--NVIDIA GeForce 8800 GT OpenGL Engine : NVIDIA : 8800

As always on the Mac, the ATI cards are generally included. This may help some in their buying decisions.

Steve.