Quoting FreeC8675

..I think it would be interesting to see if an older PC has lower amounts of phantom load compared to newer rigs. Your desktops seem to show that, but maybe an Intel Vs. AMD system or ATI Vs. Nvidia comparison would have greater disparity?

Good question. I have an old Mac G4 and a P3 that I can dig up. I'll see if I can find some time to test them. I know that the PSU plays a big factor in phantom draw, especially when shut off via the switch. When switched on, with the PC off, it is a combination of the motherboard and PSU.