If any of you has a Zacate or Ontario based system, I request that you run PCIeSpeedTest on it. You can download it from here:
http://developer.amd.com/gpu/amdapppowertoy/pages/default.aspx
While originally intended to test PCIe speeds, on Zacate/Ontario it can test the peak copy speed to/from GPU from/to CPU. Should be interesting to see how fast copy can be done on Fusion chips.
