Build Thread 1.0   An Nvidia engineer has stated that the 512MB is still around 4 times faster than system memory, and the GPU still has 224 GB/s bandwidth if memory is being accessed from both pools. The only time bandwidth is 28 GB/s is when the GPU is only accessing the 512MB pool, and it's possible for the OS, drivers, and game engine to stop that happening. Hm, as far as I've gathered, if the GPU is accessing the 512MB in question, it has to do so exclusively. So it *will* impact perform