Time flies in the tech world. Blink, turn your head for a moment, and today's greatest technology is yesterday's news. So it is with the Serenity PC, SPCR Edition. The previous version turned out to be the quietest computer system we have ever reviewed or even laid our hands on, and probably quieter than any PC will ever be, short of one with no moving parts and zero electronic noise. Another 3.5 months later, the latest version of the Puget Serenity with Sandy Bridge, SPCR Edition, is here.