Take it easy. I'm not an Electrical Engineer. I know some of the basics.
So there's no EMF with those wooden PCs? I just heard this EMF stuff when I was looking into wooden PC cases. Never got much proof but such ideas are circulating the internet.
maybe youre thinking RFI (Radio Frequency Interference)? computers can generate a pile of that but its no biggie to us biologicals (unless you have a pacemaker but it would have to be mighty strong RFI), just other electronics such as receivers or sensitive audio stuff.