If you like to watch a power supply explode then you buy a Raidmax.
Raidmax doesn't publish the maximum combined +12V continuous current rating because it would show just how weak it is compared to a reputable name brand PSU. The shorter than industry average 2 Year warranty should also be a warning sign.
An XFX Core Edition PRO550W (P1-550S-XXB9) is capable of doing the job. 5 Year warranty.http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013