hello want to buy a Gigabyte Radeon HD 4670 video card problem is I have 754 motherboard with nForce4 chipset PCI Express v1.0. from what I understood going 2.0 to 1.0. Another problem is the 1.0 is transmitted through the slot 75 of w and the 2.0 is transmitted through the slot 150w and Gigabyte Radeon HD 4670 card in idle and on load pull aprox.70 w aprox.139w (as Tom's Hardware and others but official) as compensate for the difference in watts when having to play the the board has no separate power ????. or is it better in this situation with a different video card powered Taking into account that PCIe v1.0 slot transmit only 75 W?? thank you