Please note that the "proper" power supply sold for the RP64 operated as a NAS is 12V 5A, not 12V 3A (which might be fine for the PBP but not for a full NAS). Please also keep in mind that drives need way more power when they spin up compared to when they are already running. Therefore, the power consumption usually reaches its peak when you power on your box...
The 60W PSU could be sufficient for four drives as well - the SoC does not draw that much power in the moment the drives are started (but of course, if you have 100% cpu load and then the drives come back from sleep it could be different).
Imho, my main motivation for fiddling around to get a typical 1U ATX/ITX PSU connected would be more to have everything tidy in the box than to have a more powerful PSU. Also, when using an ATX/ITX PSU I would power the drives directly from there and not through the JST connector on the board since I doubt the board and the connector were designed/tested with such electrical loads in mind.
The 60W PSU could be sufficient for four drives as well - the SoC does not draw that much power in the moment the drives are started (but of course, if you have 100% cpu load and then the drives come back from sleep it could be different).
Imho, my main motivation for fiddling around to get a typical 1U ATX/ITX PSU connected would be more to have everything tidy in the box than to have a more powerful PSU. Also, when using an ATX/ITX PSU I would power the drives directly from there and not through the JST connector on the board since I doubt the board and the connector were designed/tested with such electrical loads in mind.
