Nickel plating is used on copper conductors mostly for resistance to corrosion, resistance to high temperatures and to prevent copper from leaching through coatings of gold or silver. The price is lower conductivity (higher ohms/ft). Some high quality outlets and plugs, however, are nickel plated - so I can't see why nickel plated pc's would be a problem. But I can't see what benefits they would bring in a normal home environment either. As far as sonics, who knows - differences are heard in things when measurements or physical laws say otherwise.
Is nickel any good 4 speaker cable or power cords?
There is a brand call Canary Audio they use nickel plated copper for their power cord. I heard that nickel is no good for audio because of their low conductivity, but don't they carry more current than silver or copper? Is nickel a good material for audio stuffs? I am not quite familiar with metallugy but info would be appreciated =) Thanks