Just make two things very clear,that you should have atleast 400W+ supply from either of Coolermaster or Antec brands.
And second,you will need decent cooling to maximize the potential of your card.
@death_virus
Playing above the native resolution of the LCD isn't possible,as you dont get the resolution settings above the default in the game.
And if somehow you does,then flickering has nothing to do with the thing.
This simply relates to the power supply nuisances.