"Power Supply
Internal 300W (100V-240V)
Form factor: Internal ATX
Total wattage: 300W
Nominal input voltage range:
100-127V/6A (50-60Hz)
200-240V/3A (50-60Hz)
Dimensions: 150mm x 140mm x 86mm (5.9 x 5.5 x 3.4 inches)
This power supply has an LED to indicate a possible failure condition when the LED is off and power is connected."
Wouldnt bother upgrading anything untill u buy a bigger power supply and it will help verything get the power it needs instead of running at minimum power rating !! PSU FIRST THEN GFX