It only has 38A on the 12V rail, which would make it a decent 550W unit, or a lower level 650W unit, get a good PSU so you wont have to upgrade in the future.
550W and 750W units are the sweet spots, a 550W unit with ~40A on the 12V rail can run any single GPU card, a 750W unit with ~60A on the 12V rail can run a high end dual GPU setup. Look for one with a 5 year warranty and 80+ certification. The PSU is the only component in your build that wont be outdated in 3 years so get a good one. For dual GPUs i normally suggest the 750TXhttp://www.newegg.com/Product/Product.aspx?Item=N82E16817139006&Tpk=750TX
but it appears that the antec TP-750 is on sale this week so its a pretty good deal right nowhttp://www.newegg.com/Product/Product.aspx?Item=N82E16817371025&cm_re=TP-750-_-17-371-025-_-Product