The SilentNight (shown above) is an 80+ Platinum 500W unit with 100% passive cooling. This means the SilentNight is 100% silent as there are no moving parts to make noise. The unit itself is vented on all four side walls and features a massive heatsink where the fan would normally be for cooling.
The SilentNight PSU includes 6+2 pin PCIe, 8-pin EPS, 24-pin ATX power, and six SATA which is great for mid-range PC builds. If you are looking to build a 100% silent PC, the a quality-built Rosewill SilentNight is a great place to start.
The second entry to the Rosewill 80+ Platinum PSU family is the entire Tachyon Series of 550W, 650W, 750W, and 1000W units. While not 100% silent, the 140 mm fan makes very little noise during operation. This is also aided by the 94% efficiency as the power supply does not produce a lot of excess heat. The Tachyon Series comes with up to four 6+2 pin PCIe connects and is geared more toward higher end PC builds and gamers.
Rosewill now has everyone covered for their 80+ Platinum rated power supplies. The Tachyon series is the standard unit focused on quality at a decent price, while the SilentNight is for specialized silent builds. And let's not forget about the previously released FORTRESS series with a 7 year warranty. If you need a new power supply, Rosewill is a strong contender for your dollar.