while it will fail sooner compared to something like a corsair one, since its so much more wattage than you need for your system, its real continuous use wattage should be around the 4-500w mark, so it should power your system. Then as soon as you can afford it (next pay check?) stick in a branded one. Other than more stable power etc, the branded ones have much more protection so that if/when a PSU does blow, hopefully it wont take everything else with it.
If youd gone one step up in the GPU line, I would retract the above and say not to even power it up. As long as youve got contents insurance itll be fine
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