https://bugzilla.kernel.org/show_bug.cgi?id=201957
--- Comment #44 from MajorGonzo (majorgonzo@juno.com) --- Here's another thing I tried which also may have made a difference. Gonna sound weird, but worth a try. I had a 675VA UPS that my system was plugged into. One time, it started shrieking (weird beepish sounds) as I was doing heavy gaming with lots of visual effects going on. I looked it up, and it seems that if your UPS, or your power strip, can't deliver enough power, it can cause the issues with these GPU cards. I mentioned Dec 10th as the date I made the change for my boot parameters, but it's also the date I plugged my system directly into the wall. Responding yesterday reminded me I have a new, more powerful UPS and I plugged my system into that today. I'll see if it changes anything.
P.S. I know the argument...power is power...but it's not. If the surge protector, or UPS has cheap, thin wiring, then that restricts the amount of amps that can flow though them.