Got my 2009 2.26 today and I'm just getting things setup. My initial plan was to place the 8800gt from my 2007 2.6 quad core in the machine along with the default 120gt until i could get the 4870 upgrade. To my dismay I have not been able to get the 8800gt to work It appears as if the 8800gt that I have isn't recognized!! Does anyone know why this might happen? Was there an EFI change between the two? I also tried the orig. 7300gt that came with my previous box and received the same results.