I have a 2008 Mac Pro 2x2 GHz Quad core, 12 GB RAM (800MHz DDR2) running OS 10.6.6, and an NVIDIA GeForce 8800 GT PCIe card. As far as I can tell this card is located in the PCIe slot 1 (x16), which is the PCIe 2.0 slot. I am considering replacing this card with the ATI Radeon 5770 1 GB PCIe card along with an Apple 27" display. Amazon's site states that this particular card "[r]equires MacPro (Mid 2010 with 1333MHz DDR3 memory) with PCI Express 2.0 slot; Mac OS X v10.6.4 or later". Is that right? Does this card really need a 2010 MacPro with 1333 MHz Ram?