I might try that, but the coil whine when under load is super loud, louder than I would expect it to be, and even with the GPU fans set to max (which are super loud) I can still hear the coil whine. I usually run three monitors though, so not sure how well switching the DP cables around would help.
It's not my PSU, I've had two different PSUs plugged into this card and the coil whine is just as bad with both of them. Either way, it's not something I'm too worried about because I can't hear it with my headphones on, and it might allow me to get a free upgrade... maybe
Now I thought I had coil whine and it turned out to be the chipset fan on gigabyte x570. It took me a long time to figure that out as I convinced myself that 2 waterblocks GPUs would certainly make a ton of coil whine. Just something to consider!