This has 100% been my experience, even with in-person shopping.

You ask for an Arduino, and the follow up question is: 'genuine or generic?'.

I don't think the Arduino trademark is that valuable, it's already well underway genericization.

The NPU is somewhat usable on RK3588(S(2)) boards, as long as the kernel you’re using is recent enough to have the latest NPU driver.

For a quick bring-up and implementation, take a look at this repo: https://github.com/Pelochus/ezrknpu

I have a Radxa Rock 5C (on Armbian) and it runs various models rather well. Trying to convert models is kind of a pain, though, so watch out.

Works great for me on Frigate. I am doing object detection on 3x 4k streams and it’s only 20% utilized.

Has anyone found a good table of tokens/s comparing different cards and systems (CPU, GPU, NPU etc.)?

Also: recent Geekbench should have NN tests: have you found dedicated comparison pages, and is which processor (C/G/NPU) is used clear?