Okay, while you CPU uses very little power and the GPU is also light on power, it should work. BUT looking up a review of that PSU and at first it looked good, till I saw the tests.... Its a pretty crappy PSU. At best it can put out 400W before things go down hill. Even while gaming you PC shouldn't draw anywhere near 400W I would suspect that it is whats giving you the trouble. If you can return it.
One other possibility is that you may have forgotten to plug in the power cable that goes to the video card, that cable is required and not optional.
Quality PSU brands are Seasonic, Corsair, Antec, Enermax, FSP group and some others.
Link to review Review