Sea Sonic Electronics Co., Ltd. (), stylized as Seasonic, is a Taiwanese power supply and computer PSU manufacturer and retailer, formerly limited to trading hardware OEM for other companies. They first started making power supplies for the PC industry in the 1980s. All of their PSUs are certified 80 Plus. In 2002, Sea Sonic established a wholly owned subsidiary in California to sell products in the US retail market and to provide technical support. History 1975 Sea Sonic incorporated to manufacture Electronic Test Equipment. 1980 Sea Sonic enters the PC power supply market 1984 Headquarters relocates to Shilin, Republic of China. 1986 The factory phases in Automated Test Equipment in production methodology, this is the first in switching power supply manufacturing in Taiwan. 1990 Second factory in Taoyuan County (now Taoyuan City), Taiwan begins operation. 1993 European office opens in The Netherlands. 1994 Dong Guan China I factory begins full operation. 1995 Sea Sonic develops an ATX power supply for the Pentium market. 1997 Dong Guan factory receives ISO9002 certification. 1998 The Dong Guan II factory begins full operation. Taiwan headquarters and Taoyuan factory receive ISO9001 certification. 1999 Headquarters relocates to present address at Neihu, Taipei. 2000 Dong Guan factory receives ISO 9001 certification. The first PSU maker to provide PC and IPC market cost-effective Active PFC (Power Factor Correction) solutions. Designs and applies S2FC (Smart & Silent Fan Control) towards PC and IPC products. 2002 USA office opens in California, USA. Sea Sonic Electronics Co., Ltd. lists on Taiwan's Gre Tai Securities Market (OTC Stock Exchange). 2003 Launched retail products with own brand name and won awards and recommendations worldwide. 2004 Dedicated to develop green and silent power supplies with higher efficiency and higher power output. 2005 The USA office was renamed as Sea Sonic Electronics Inc., a 100% Sea Sonic owned subsidiary, to serve North and South America customers. The first PSU manufacturer to win the 80 Plus efficiency certification. 2006 Dong Guan factory receives ISO14001 certification. Began to mass-produce RoHS & WEEE compliant products. 2008 European subsidiary opens in the Netherlands to serve the European market. Dong Guan Factory II begins full operation. 2009 Sea Sonic is first in the market to achieve 80 PLUS® Gold rating by introducing the X-Series power supplies. 2010 Sea Sonic introduces the world's first 80 PLUS® Gold rated fanless models to the worldwide retail market. 2011 The 80 PLUS® Platinum rated