The Radeon 5770 works fine with your Mac Pro 1.1
Don’t want to let go of your good ol’ first generation Mac Pro (Intel) just yet? But need to connect one or two new Apple Cinema Displays via Mini DisplayPort? The Radeon 5770 is for you. It’s affordable (US$ 249) and runs smoothly in the Mac Pro 1.1 though this combination is not officially supported by Apple. The cpu speed gain for 3D rendering is marginal (Cinebench says 2.92 compared to 2.79 with the GeForce 7300 GT). But OpenGL performance and HD video playback do improve noticeably. Well, it’s your choice, the thing works!