Yes... PSU at 1000W... without Crossfire ? Hmm, not sure about that, and I assume you mean to shut off one of the GPU ? Hmmm not sure how to do that yet, might give it a try when I know how

Currently running OCCT testing stability of the card, 0 errors after 30 minutes, running at temp 90c - yes, hot... but FFXIV crashed on me in less than 20 minutes at 80c.... I would want to believe it's the card's stability problem so I can get a warranty quick, but doesn't seem so....