I just bought a BFG Nvidia Geforce GX2 graphics card simply because it was so cheap. I am thinking of flashing it with the EFI but I heard it can be more complicated to flash and set up this kind of card. In order to run it I need to externally plug it in for my older Dell E520 ( power supply is only 305W ) to flash it and I need to mod the case a little for it to even fit. And how would I power the card once it's in my Mac or should I just keep it for a future PC build? And where could I get an external power source for this card?