GPU-Z reports my 8600GT as a 8600GT, but the bandwidth as 12.8GB/s. the nVidia web site ( http://www.nvidia.com/page/geforce8.html ) reports an 8600GT should have a bandwidth of 22.4 GB/s. Q. Does the GPU-Z calculate this value from a live test or does it do a lookup of pre-stored values? Q. Who's right? nVidia web site or GPU-Z ?