Yeah but again, if any of this was a problem, I wouldnt be playing games at 4K 144hz, so all this is moot really as if there were any issues with bandwidth I wouldnt be running those resolutions and frame rates. As for power, same thing, if there was any power issues you would get freezes, crashes, bsods etc. But yeah its got all the power it needs, had zero problems in just under 3 years.
The oiginal recording issue seems to be fixed anyway, not sure which bit it was but tried deleting the display capture while capturing game footage i havent had issues since.