Now that we're officially in the throes of holiday shopping season, NVIDIA's rolling out a promotion of its own, though sadly it doesn't involve any steep discounts. The outfit just announced a special edition GPU: the GTX 560 Ti with 448 CUDA cores, running at 1.46GHz, a 732MHz graphics clock and 1.25GB of GDDR5 memory charging ahead at an effective rate of 3.8GHz. Other features include support for three-way SLI, DisplayPort, HDMI and DVI. Those specs place it snugly between the current GTX 560 Ti with 384 CUDA cores, and the higher-end