I would argue that it being done on the cable does NOT mean it's improper. I have a very nice SeaSonic X750 that makes buzz when hooked up to high-powered graphics card that go into 3D mode.

I've got a SilverStone Strider Plus on the way and I'm hoping *fingers crossed* that the cap will alleviate this issue. If not I'll mash it all up with a sledge hammer Office Space style and move on with my life. Tired of these modern, low quality, solid-sate electronics. Nothing but trouble.