Turns out my monarch may not be bad. I was getting by with a 550W supply on one Monarch before. I'm thinking the power draw on Campaign 7 is higher than previous projects I ran. The 500W runs it now after I reseated all of the fan controllers on the Monarch, but trips off as soon as it's under load.

SO: Crazy question, I have 3x6pin inputs on the Monarch. Is it possible to split the load on those between 2 500W power supplies? I'm thinking no, but I just wanted to check if anyone has done it.