Hi guys I just hooked up a 2nd monitor to my early '08 Mac Pro and when in OSX the screens start to go blank/blue for about 1 second intervals. They flash together sometimes, and other times sort of independantly to each other. When the desktop comes back on it fades in like its animated rather than like its cutting in and out. It seems fine when I disconnect one monitor. Running 10.5.2 all updates 8 core 2.8ghz with 10gb ram and 8800GT Please help!!