[EDIT] Ok so I got my GTX 280 in and ordered the correct cables. Someone told me at bestbuy that the card requires too much power for the PSU in the mac pro 1,1 to handle over a long period of time. He also said that I would need an additional cooler for the card, and so I would need an external psu to power this cooler. I already figured this was the case, but not sure if I need to spend so much money on a power supply. Do you guys think this is true? I was thinking of powering the cooler from the optical bay 4-pin but this guy said all of this would make my mac pretty much fail. Just wondering whats the best route to go since I know some of you are successfully using this card (with no extra psu) [EDIT] I didn't want to start a new thread for such simple questions so ya. Thnx again!