Well, blue screens may not be caused by your graphics card alone. It could be insufficient power or components overheating. I'd recommend that you first change the power supply. It's not a good brand and you're only betting against the odds with it. Sure it is rated at 430 but is it peak or continuous? Also, keep in mind as as power supplies age, they become less efficient, so do the capacitors within it. First, get a new power supply, Corsair VX400 recommended. See if that solves your problems.