The discussion here is quite scary and depressing if it is representative for the /. gang.... So you mean that concentrating all the blades to a single PSU with 70% efficiency would consume less power than having multiple PSU:s with 70% efficiency! What component exactly would consume less power in this case? And for the outher guy claiming that "waste" power heats with less efficiency than a heater. Sheesh... Go catch up on your physics!