It's no argument that since the introduction of the i7 core CPUs that there's been a leap in scalability of having 3-4 GPUs. This makes me curious though as to why the GPUs scale so well. It's been suggested that it's the memory bandwidth, and it's also been suggested that it's having so many threads, but I find this hard to believe because the former could be acheived by OCing the AMD64 line of CPUs and the latter never revealed any results from moving to one to two to four threads. My belief is that the scaling power doesn't lay in the CPU itself or even the memory controller, I believe that it has far more to do with the x58 chipset's architecture. I just want to see what you guy think in this matter. Maybe we all might learn something.