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. Seasonic's claim for 2% voltage regulation at all rails looks to be true since even at the very high ambient I conducted all tests, I measured way below 2% deviation at 12V and 5V while 3.3V surpassed the 2% mark only by a small percent. Regarding ripple suppression, it is outstanding and to speak frank I didn't expect anything different here since Seasonic platforms are proved to be ripple-proof. If you combine all the above with the fully modular design, the fan that has the option to go fanless at loads smaller the 30%, the seven year warranty and the Japan-made caps then you can easily figure out that this unit aims directly at the top of its category. The only downsides I spotted are the high price, although it's worth every penny of it and the fan which at very high operating temperatures and high loads can be loud.
To sum up, if you want the best 1000W unit money can buy today then SS-1000XP is the right choice and is already available in the stores. For those of you that don't need 1kW of power, the Platinum 860W will be available on December 15th with an MSRP of $220. Now that Seasonic has Platinum units I am eager to see an even stronger PSU from them, or at least a 1250W Gold unit.
Seasonic nailed it, totally!!