My apologies, I should not post with a temperature
Somewhere along the way I forgot about the card.
A stock GTX 275 pulls max 221W from the PSU, less under typical loads
Having said that I would not recommend the 400W, though it would probably work.
OCZ ModXstream Pro 500Whttp://www.newegg.com/Product/Product.aspx?Item=N82E16817341016
Use the promo code and it's $35 after rebate. Not quite the quality of the Antec, but a fine budget choice.