You could power both Supermicro boards directly from single 12V psu without PicoPSU. Atleast my board works nicely when powered via 4-pin connector J1.
And don't do what you seem have done in all pics. A1SAi/A1SRi-series motherboard manual and quick reference guide have warning:
And don't do what you seem have done in all pics. A1SAi/A1SRi-series motherboard manual and quick reference guide have warning:
*Do not use the 4-pin DC power @J1 when the 24-pin ATX Power @JPW1 is connected to the
power supply. Do not plug in both J1 and JPW1 at the same time.
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