The DC voltage load regulation is excellent but it is let down by what I would consider high noise/ripple levels on most of the rails, although they still met the requirements of the ATX12V V2.2 specification. It should however be noted that the measured ripple/noise levels were taken at 104% DC loading, effectively an overload, but I'm fairly certain there would be little if no difference at 100%. The efficiency of the Thermaltake Toughpower Grand 750W is up there with the best and will certainly save a few pennies on the utility bills.