Been searching the boards for awhile now trying to find install guidelines (if any). I have a Mac pro 1st gen (early 2006) that has the nvidia 7300 card. i bought a ATI X1900 XT to replace it. When i went to reboot after installing the card in slot 1, i have no video output, (but the fan does spin). Are there drivers to install? The box did come with PC/Mac install software that when run says its for the Mac G5 edition "This product is intended only for the Dual Core Power Mac G5 systems. A different system has been detected" Now i know i dont have a G5, but understand this is the card that i use? Any help would be greatly appreciated!