RX580 Audio interference

[mattspace]

Maybe my problem is different, but I noticed this on my hack after moving from a GTX 980 to a powercolor Rx 590 in order to have mojave support. I'm using a USB audio interface (Roland octa-capture). The weird part is that if I don't go through the headphone amp, I don't hear the problem, so I figured it was the headphone amp, but I didn't have any such issues with the GTX 980.

With the GT-120 & a Dell screen, I didn't notice it either, but it's odd - I pull the audio connection between the Mac, and the Belkin / speakers, and run a GPU heavy task, like stabilising video in iMovie, and the speakers start purring rhythmically. So, something in the GPU's (displayport) output is inducing noise in the display's audio output.

 

[jeremypevar]

So, anyone else getting hum from speakers connected to their 4,1 or 5,1 when doing graphical things since installing the RX580?

By which I mean, when I quicklook an image in finder, I have a buzz coming from the attached speakers while the image is opening out, or in Aperture, the speakers hum while moving an adjustment slider.

It could be that I'm only hearing it because I've got a bunch of different devices going into a passive audio mixer (belkin rockstar) and out to the one set of speakers, but it's definitely a post-RX580 behaviour.

I know this is a three year old post, but did you ever solve the problem? I just installed a Sapphire Radeon RX 580 8BG in my Mac Pro 5.1, and am having the same issue. Loud static thru the analog line out (and thru the headphone jack) that seems to change/correspond to things happening on screen. I've got dual Dell displays plugged in via the Display Ports.

 

[MarkC426]

I have dual Dell dp monitors and Bose powered speakers (speakers are positioned right behind one monitor also).
Never heard any hum....?