I was having a weird graphics issue and one step I took in troubleshooting, as told to do by Apple over the phone, was reset the PRAM. Now every time I boot the Mac Pro, the white and grey apple screen is stretched and looks to be around 800x600 while my monitor resolution is 1920x1200. Once it reaches the login screen, everything looks fine again, it's just the main boot screen with the apple log and little spinner icon. I know it was resetting the PRAM that caused this but how I can get my resolution back to normal? Please help, I know this is a small problem but it's extremely annoying, especially considering the resolution looked fine before resetting PRAM. Thanks.