We have previously previewed the 1000W model of the upcoming 80 Plus Silver rated Silent Pro M2 series from Cooler Master. Then during CES 2012 which recently concluded, the monstrous 1500W version was on display at their private hotel suite. Delivering up to 125A of current over two 12v rails, this big daddy of power supplies should be able to handle overclocked multi-gpu setups with ease.
The 1500W Silent Pro M2 which was on display, among other items at Cooler Master's Bellagio suite in Las Vegas
Uses a high current C19 connector, which is rated up to 16A from the socket and usually found on blade servers and higher wattage power supplies like Antec HCP 1200,
Specs Label, no word on availability or pricing yet