Yes, I think the PSU is good...have tried a few. I do think it is a bad unit. Looking back in this thread I saw that a lot of these were RMA'd and repaired. Was curious what the repair was, and whether any of it was doable by a regular person without specialized equipment.
I'm going to assume you've got a suitable PSU as you seem familiar with gekko products. Only thing I can say is that its a bad unit. Was it sold as working?