Seasonic today introduced three Prime SnowSilent series PSU models. The series is characterized by white main body, a chrome-finished steel fan grille, and a white impeller on its main fan. The internal DC outputs and AC receptacles are contrasting black. There's an intense design focus on keeping the noise output of these units low. The fan downright stays off below a load threshold, and only has a low noise output beyond that. The fans feature fluid-dynamic bearings to help low noise and longevity, to keep up with the series' staggering 12-year product warranties.The three models launched today are the SnowSilent 550 Gold, SnowSilent 650 Platinum, and SnowSilent 750 Titanium. The SnowSilent 550 Gold puts out 550W continuous output, and boasts of 80 Plus Gold efficiency. It is intended for gaming PC builds with 1-2 graphics cards. The SnowSilent 650 Platinum features 650W continuous output, and 80 Plus Platinum efficiency. The SnowSilent 750 Titanium leads the pack with 750W continuous output, and 80 Plus Titanium efficiency. The 650 Platinum and 750 Titanium are intended for builds with high CPU power draw, and 2-3 graphics cards.Under the hood, all three models feature DC-to-DC switching, active PFC, micro-tolerance load-regulation (MTLR), a single +12V rail design, and most common electrical protection mechanisms, against over/under-voltage, overload, overheat, and short-circuit. The 550W model features a single 4+4 pin EPS connector, and two 6+2 pin PCIe connectors. The 650W model comes with four 6+2 pin PCIe (two more than the 550W model). The 750W model has two 4+4 pin EPS (one more than the other models). All models feature six SATA power connectors, five Molex, and one Berg. The 550W and 650W models are 14 cm long, while the 750W model is 17 cm long. The company didn't reveal pricing.