you should be fine. I would go with a bigger one for more head room
like this 650watt
http://www.newegg.com/Product/Produc...82E16817139005
$94.99
$20.00 mail in rebate
74.99
both are almost the same price I would get the 750watt
750watt
or this http://www.provantage.com/corsair-me...x~7CSMC05E.htm
$94.53
-20.mail in rebate
74.53
like this 650watt
http://www.newegg.com/Product/Produc...82E16817139005
$94.99
$20.00 mail in rebate
74.99
both are almost the same price I would get the 750watt
750watt
or this http://www.provantage.com/corsair-me...x~7CSMC05E.htm
$94.53
-20.mail in rebate
74.53