Has anyone every run one of these with 2 PSU's?
no reason why you couldn't - just use 1 PSU per blade, and power both at the same time
I am powering my miners with 2 PSUs on each. Sushi told me not to do this however this seems like the only way to get best out of them. Single PSU sometimes shutdowns and display a lot of Xs. 2 PSUs seem to power them without a problem.
Electrically there would only be a problem if you had each PSU on a different phase. Used to get this in the old days of RS232 where the printer was a long way from the server as the reference ground volt value was slightly different. It should not cause a problem in a house or single office, I run one of my Ant's on two old 450W Corsairs and it works like a charm.
the 12V DC signal has no phase, it should be a consistent current and voltage from both power supplies. anyways, i doubt any of the 12V goes between the blades to cause any issues even if there was phases
If you have one PSU on one phase and another on a different phase then the value for reference ground can be different between the two 12DC outputs. This is enough to screw up signalling that uses reference ground between any two pieces of equipment on the two different PSU's that do not exchange their own value for reference ground with the opposite receiver.
Ant's have two blades, each individually powered, now I don't know what the signalling protocol is used between the two hence my statement that there could be a problem. Perhaps this is why Sushi said not to do this.