Is it really the capacitors that makes the noise? I thought it was coils and such. Anyhow, it's my experience that low power stuff whine less than high power stuff, so luckily I've had little problem with whining components.
Capacitors don't make any noise (except "boom" when they blow up). The noise you are talking about are from coils. And no, you can't avoid them.
My understanding was that the capacitors had harmonic vibration. In the folding community, some people who have been especially tortured by nVIDIA's squealing / whining caps used nail polish or silicon to attempt and reduce the squeal. https://theovalich.wordpress.com/2008/1 ... squealing/http://www.overclock.net/t/476207/squealing-capacitors
Maybe it is the inductors as well. I know when I power off my PC I can literally hear the capacitors drain as the squealing slowly quiets.
Asus has recently made chokes for their higher end cards that are set in concrete. I've never had an opportunity to hear one to see if it actually makes a difference though.http://www.bjorn3d.com/wp-content/uploa ... design.jpg
First, the digital part of VRM is what makes the noise. If you make a analog Voltage regulator module, you would get no noise from the power supply. Of course the furnace squirrel cage fan would be a bit noisy.
I should have said Solid-State instead of Digital. It wouldn't let me though as the title didn't offer enough characters.