Corsair AXi Series 1500 W @ techPowerUp
 

Corsair is first to release an 80 Plus Titanium-certified PSU, which is the flagship of their top-notch AXi line. The AX1500i is the best PSU we ever tested, and at 1.5 kW, it is strong enough for an incredibly powerful system with a four-way SLI or Crossfire configuration.

http://www.techpowerup.com/reviews/Corsair/AX1500i/