The recommended PSU set up per Neptune is 3 x 850w (for instance Cooler Master V850). There's one 6-pin connector per Cube, and there's 5 Cubes altogether on a Neptune, plus a controller board in it's own box. They can all draw their power from 3 x 850w PSU:s (connecting max two Neptune Cubes per 850w PSU).
The PSU PCIe-connector has to be a 45750 Mini-Fit® Plus HCS Crimp Terminal Crimped to 16 AWG wire.
Each Neptune Cube uses a high-quality PCI-E-type connection and draws approximately 300-400 watts at it’s port, depending on firmware settings and updates (subject to change).
These ports are fan-cooled and can handle the power (rated 13A), but make sure you’re using high-quality PSU:s, connectors and cables. Be careful when inserting and removing connectors as wear and tear may damage connectors. The act of inserting/removing cable connectors into ports degrades connection surfaces every time it’s done and should be minimized.
It’s possible to lower the total power consumption using higher-quality or specialized setups.
We’re optimizing Neptune’s firmware and some of the figures here may change slightly due to updates as we’re fine-tuning for best possible performance.