I have installed a Sapphire HD5770 board on my S3200SH m/b and when I cold boot the system it takes approx 10 minutes before the display lights up and then continues to load Windows 7. If I warm booth the system it is almost instant. I am guessing the BIOS is not seeing the secondary display and waiting on the onboard display? Is there anything I can do to get the BIOS to immediately recognize this video card? FYI I am using the DDVI connector on the video board to my monitor.
Check the tested hardware lists at http://www.intel.com/support/motherboards/server/s3200sh/sb/cs-028291.htm - sometimes there is a required BIOS version or firmware version for compatibility (or sometimes the card isn't on the list at all).