He didn't ask about gaming GPUs, he asked about a card and the amps.
Well, pretty much any Antec PSU made in the last 3years will run that card no problem. Nvidia lists 300-400w requirement on that card, depending on the model (600mhz gpu clock = 300w PSU, 650 GPU clock = 400w PSU) but those numbers are inflated to compensate for cheap, low quality power supplies. Antec is much better than your average PSU, so I would not be worried about it.