Nvidia released 2 of their GTX 700 Series cards recently- GTX 780 and GTX 770. One of the manufacturers displayed the box art and the card modeled Nvidia GTX 760.
The card looks similar to GTX 670 and 660. The GTX 760 uses GK104-225 core, according to the report. The card does use 256-bit memory interface with 2GB GDDR5. GTX 770 uses GK104-325 core, as confirmed by the basic specs mentioned in one of the pictures.
Considering that GTX 670 has a core frequency of 915 MHz with GPU boost pushing up to 980, GTX 760 should have a slight bump as well.
But unlike GTX 780 and GTX 770 reference versions which used the same cooler design as Nvidia GTX Titan, this card does not use the same cooler type, though the plastic casing shared a similar ‘mould’.