Is the powercape compatible with AI board?

Hi, I bought a powercape and an AI board.
The powercape is listed as compatible with the black, but not sure about the AI board.
I tried it, cape powers on, but AI does not power on, cape still works as it power on with USB power.

Is the powercape compatible with the AI?
If not, recommendations for a different cape to feed power from a PSU and not from USB?