Hi i really don't know that much about hardware stuff but i was wondering if i could run a GeForce GTX 280 on my early 08 mac pro and keep the 8800GT for OSX? also I'm hearing stuff about BIOS flashing? and i was wondering if someone could explain that to me it says the GTX 280 needs 500 watts power supply is that possible cause i thought i heard that the mac pro only has like 300 watts so basically i don't know anything about anything!! anyway i know that this card is brand new but i get very excited about this kind of stuff and was just wondering if anyone knew anything about it thanks!!