They get this number by simply adding up all CPUs' processing speed. There is no NPU or similar: https://medium.com/@zlodeibaal/orange-pi-rv2-ai-board-scam-7...

Four of the eight cores have matrix accelerators. If you are using the full 2 TOPS of accelerated performance, you have four more otherwise symmetric cores free to run regular workloads, otherwise you have eight. I'd rather have this setup than 4 regular cores and a separate asymmetric accelerator that provides 2 TOPS to matrix/tensor calculations but otherwise sits idle.

thats even worse. 0 TOPS!

The whole point is offloading load from CPU and doing something in parallel while NPU does its thing.