Tesla device to device bandwidth

The bandwidthTest program that is provided with the CUDA SDK is reporting over 120 GB/s for the device to device bandwidth. The Nvidia web site says that the maximum bandwidth is 76.8 GB/s. The command I used to execute the program is:

./bandwidthTest --device=all --mode=range --start=1024 --end=16777216 --increment=16384

What am I doing wrong here?

Thanks in advance :ph34r:

With device=all, another forum poster reported that bandwidth test adds up the two independent bandwidth measurements.