Different Corals and their inference speeds

I have a dual tpu coral as well as a USB coral. The dual TPU is attached via an adapter so both TPU’s show. The USB Coral is plugged into a USB 3.2 As you can see from the attached image, there isnt a whole lot of speed difference between the two. Coral 3 is the USB. I just figure some people may be interested in this info…

Dual TPU:

Got mine off EBAY.
Dual Edge TPU Adapter - PCIe x1 Low Profile | Makerfabs?

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Thanks so much for this info! I was looking for this but Google search didn’t turn out too many evidence-based results. Thanks a lot!

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Probably the workload is not heavy enough for Dual Edge TPU to unleash its double potential.