Is there any actual explanation of how an EC2 instance would perform better than a physical machine ?
I find that kind of hard to believe.
It only mentions using the same two GPUs (dual Nvidia M2050 GPU units), not the same overall setup. Before the bandwidth graph that shows EC2 really beating out the native setup, note this comment:
"Note the capped PCIe speeds in the client hardware are likely due to motherboard and chipset differences."