I would highly recommend the Corsair HX520W to anyone considering mid-range graphics cards in SLI or Crossfire but perhaps it's a little underpowered for the serious gamer/overclocker. The Corsair HX520W is Nvidia certified for up to, but not including, the 7800GTX and is listed on the Nvidia website in the "For all other SLI configurations" section. This will no doubt put the majority of gamers considering an SLI or Crossfire setup off this power supply but if you require one for an Internet, office and single graphics card PC then look no further, the Corsair HX520W would be a wise choice.