Summary: Although they arrived a little bit late to the Platinum party, Seasonic did it again. Their new Platinum units, judging of course from the sample I have in my hands, are outstanding and definitely worth every dollar (or euro) of their high prices. The SS-1000XP registered ultra high efficiency at 20-100% of its maximum rated capacity and even at loads smaller than 100W efficiency was noteworthy. Another great aspect of this unit is voltage regulation.
Pros: Ultra high efficiency, Outstanding ripple suppression, Tight voltage regulation on all rails, Good response in dynamic loads, Hybrid fan operation mode, Fully modular design, High manufacturing quality, Japan-made capacitors exclusively used, Seven year warranty
Cons: High price, Audible fan at very high ambient & load