Two questions:
How did you connect your two PSU's together? I ordered a ATX with molex coupling board, but didn't realize the EVGA's don't come with molex connectors.
And are you using the SATA to Molex adapters for the riders? Keep reading that it should be 4pin to molex, but again, the PSU doesn't come with those.
I use add2psu, which basically connects the ATX connector of the second psu with a molex of the first. The psu I use are
https://www.evga.com/products/product.aspx?pn=210-GQ-0750-V1They do have a molex cable that can be plugged into a perif1 port.