When NVIDIA took the wraps off its family of 28nm Kepler GPUs, it promised some mobile chips designed for Ultrabooks were soon to follow. Two and a half months later, we haven't seen that many laptops running the 600M series, save for the Acer Aspire M5, which isn't even on sale yet. Now, though, we're about to see a lot more: in advance of Computex, a computer-centric trade show about to be overrun by Ultrabooks, NVIDIA is spilling details on the GeForce GTX 680M. As the top-tier offering in the mobile Kepler lineup, it packs a 720MHz engine clock, 1,344 CUDA cores and a 256-bit memory bus powering up to 4GB of GDDR5 RAM. As a refresher, all of Kepler's GPUs make use of a new GPU Boost feat... »read more

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