swap out the power supply that a no name brand unit. swap in a cosair power supply for the same wattage you may spend 20-40 more for the cosair before rebates but it last longer and the system wont have any power issues.
The 650 TI is listed there as a great gpu for its value in the $110-$180 range of gpu's. You won't max out all games with that card but at medium settings it is fine for gaming. Not the best card but sufficient.