The folks over at Expreview have managed to take a snapshot of what appears to be the GTX 760, as well as noting a small number of its specifications.
Nvidia GeForce GTX 760 Pictured : Read more
Nvidia GeForce GTX 760 Pictured : Read more
GeForce GTX 760 Ti GK104 2048 MB, GDDR5, 256 bit 925 MHz 1502 MHz 1344 Shaders/ 112 TMUs/ 32 ROPs
GeForce GTX 760 GK104 2048 MB, GDDR5, 256 bit 915 MHz 1502 MHz 1152 Shaders/ 96 TMUs/ 32 ROPs