Which powersupply should I get for my upgrade build? : http://pcpartpicker.com/p/bkwRnQ
550w: https://uk.pcpartpicker.com/part/xfx-power-supply-p1550gts3x
650w: https://uk.pcpartpicker.com/part/xfx-power-supply-p1650xxxb9
550w: https://uk.pcpartpicker.com/part/xfx-power-supply-p1550gts3x
650w: https://uk.pcpartpicker.com/part/xfx-power-supply-p1650xxxb9