It should be alright for the time being. Its a good wattage, but the fact it has no name makes it a guessing game as to wheather it can do the voltages as it says it can, and give them solidly without sending spikes of power to your components.
If you can't afford it though, for the moment, i'd risk using that powersupply, but as soon as you can get one, buy one, okay? At least it seems stable enough to have ran your system so far, so I guess it should be alright for a little bit more,
though that card will take alot out of your PSU power