Stop gaming with that computer IMMEDIATELY.
There is a very large difference between the $50-60 450w PSUs and ones like circle.
The wattage numbers claimed by these brands are a flat out lie and the unit cant really perform at this level. They are the equivalent to the "2000w" car amplifiers sold out of the back of a van.
The bad thing is that when these PSUs die, they lack any sort of safe gaurds in them so they often fry your GPU, your motherboard and other parts when they die. Some have even sparked to the point that they have caused house fires.
So we urge you to stop using that PSU and replace it asap.