is that PSU
http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013&Tpk=xfx%20pro550w
good enough for this VGA gtx 660ti
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121656
http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013&Tpk=xfx%20pro550w
good enough for this VGA gtx 660ti
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121656