Texture memory speed test

Speed test program
http://forums.nvidia.com/index.php?showtopic=181432&st=0

"On Fermi, global memory loads are cached in L1 and L1 cache has higher bandwidth than the texture cache"
http://stackoverflow.com/questions/9893086/why-in-my-case-the-texture-memory-is-slower-than-the-global

Spatial Locality of texture memory usage.