So i've read alot of good things about the Sapphire 7870XT and i'm looking to upgrade from my Hd6870. I am also looking to upgrade my PSU when i purchase this new card (Currently 500w) but no idea what makes of PSU are reliable/suitable for this card... or to work out what cables are needed. (i could possibly open my case and look but i'm still not 100% sure what each cable is what)