For those people with gecube 9550ee (400/250x2) with hynix 2.5 memory like me, good news after trying so many 9600pro bios, I've found the correct 9600pro bios that works great for both for 2d and 3d display.
http://www.techpowerup.com/bios/
Asus 9600 Pro 128 MB(400/300x2) unknown memory...