Rosewill announced the SilentNight 500W fanless PSU and Tachyon 550W. The two 80 Plus Platinum-compliant PSUs were launched earlier today. The SilentNight 500W appears to be based on a Super Flower platform, and uses a chunky aluminum heatsink that makes direct contact with hot components such as FETs, to cool itself, without needing a fan. It features sufficient cabling for a mid-range dual-GPU gaming PC, including a pair 6+2 pin PCIe connectors, 8-pin EPS, 24-pin ATX, and up to six SATA power connectors. It uses a partially-modular cabling layout. The Tachyon 550W, on the other hand, uses a slow (quiet) temperature-controlled 140 mm fan to cool itself. It packs an identical contingent of cables to the SilentNight 500W. Both models feature single +12V rail designs, modern regulatory compliances, and protection against a variety of electrical anomalies, such as over/under voltage, overload, short-circuit, overheat, etc. The two will occupy price points around US $100.