I'm still on an old Asus P5B Deluxe mobo with Q6600 CPU. My old GeForce 7600GT card was starting to fail so I upgraded to an Asus GeForce GTX 560 Ti.
In Windows it runs fine and performance is greatly improved, but during boot the BIOS POST text display is laggy compared to the 7600GT.
Any ideas on why a much more powerful card is slow updating the display during BIOS POST ?