Originally Posted by Mike Garrett
That may keep it from getting to the HTPC, but cable system grounding is notorious for causing ground loops. That is why I suggested disconnecting, then if it is the cable company, pretty easy to filter out.
I dont have Cable or any Coax, or even Aerial TV of any kind though.
Otherwise every other device other than
my htpc is on the same power-strip thus the same ground wire to the wall.
I even tried the HTPC on the same power-strip (Did I mention I tried everything) and no go.
Because its a video card introducing the noise, and only under load (I also tried multiple video cards) I think this is a unique situation for Nvidia cards, kind of like coil whine.
I don't think the issue is it getting to the PC
, I think the issue is the PC is creating it
. If I disconnect that HDMI cable to my AVR, I have completely and utterly silent gear. Zero noise whatsoever even with my ear right up to the TPL-150. Oddly if I also disconnect the projector HDMI, noise gone too, but useless scenarios though.
I also know the PC is causing it because it literally only begins when I hit play on a film through MadVR which puts heavy load on my GPU and PSU (Which is actually 1kw so by heavy load I mean 250w max), and I can even MUTE my AVR and the noise is still there with content playing. With all the grounding chassis wires in my system the noise becomes super minimal, I can only hear it slightly if I mute all my gear, but I want it 100% gone.
Anyway, the fiber cable will fix it I know that much is certain since the noise completely vanishes when I unplug the PC HDMI cable. And the muting confirms this is a proper ground loop and not just noise added to the HDMI signal otherwise I should also be able to mute that noise.