Posted June 23, 2014
Those cards do not need less power than TDP; in fact, they will probably run over TDP, especially if factory overclocked.
I think I may not have made my point about the sub-500 watt power supplies clearly. Whether it's from a solid manufacturer is meaningless. There are no first-rate sub-500W power supplies on the market from any manufacturer. There is no reason to assume that the OP has a power supply that does not in fact exist. The closest thing to a satisfactory sub-500W power supply would be the Delta-made Antec Earthwatts 430D. But that's not adequate to power a card that must be able to pull 6A and 8A over two separate auxiliary connectors.
I think I may not have made my point about the sub-500 watt power supplies clearly. Whether it's from a solid manufacturer is meaningless. There are no first-rate sub-500W power supplies on the market from any manufacturer. There is no reason to assume that the OP has a power supply that does not in fact exist. The closest thing to a satisfactory sub-500W power supply would be the Delta-made Antec Earthwatts 430D. But that's not adequate to power a card that must be able to pull 6A and 8A over two separate auxiliary connectors.
Post edited June 23, 2014 by cjrgreen