FUD Zilla heard NVIDIA's GeForce GTX 460 will arrive on July 12th in 768MB and 1024MB models:
Nvidia won’t launch just one, it will launch two cards based on the GF104 chip. The fastest one will end up with Geforce GTX 460 name and it comes with 1024MB of memory on a 256 bit bus.
The second card is called Geforce GTX 460 768MB and as you can tell, it has 768MB of 192bit memory. There might be some clock difference between these two but this is something we cannot confirm at press time.