Hi, I'm trying to understand the real wattage of a pc. Lets just say it's @ 400W. Watts = VA If it's 400W @ 12 volts, it's going to be a lot less at 240v right? As the voltage has gone up. Is it as simple as 12 is 1/20th of 240 so it will be 20 watts at 240v (plus PSU conversion losses) or is there a different way to calculate this. Does the curernt have a bearing here - will that have changed as well? Thanks in advance.