Sonnet eGFX Breakaway Box: Power Supply Upgrade (Guide)
I’ve documented the process of upgrading a Sonnet eGFX Breakway Box from 350W to 550W.
Enermax SFX Power Supplies have been shown to work well (without upstream power delivery to your Macbook over TB3):
I wonder, can a Thunderbolt 3 eGPU box with power delivery provide Power Delivery to a USB-C only MacBook? The MacBook can't use a Thunderbolt eGPU but it might be able to get power from one (Thunderbolt uses the USB-C Power Delivery spec).