:::: Sea Sonic ::::

Technical Support

Seasonic Technical Support Team is willing to provide more information to our customers and users. The goal of this team is to introduce Seasonic products and power supply related technology in user-friendly language. Welcome your questions and comments.

We would encourage you to first read the FAQ section and check if you can find the answers to your questions. If you are unable to get the answers you need, please contact our Technical Support Team by sending an e-mail to support@seasonic.com.tw .

List of Frequently Asked Questions

Q 1	What's PFC? (Power Factor Correction)
Q 2	Why we need PFC?
Q 3	How can a PFC power supply save energy?
Q 4	What is harmonics?
Q 5	What countries are adopting the PFC requirement for electronic equipment?
Q 6	What's Active / Passive PFC?
Q 7	Why Active PFC prior than Passive PFC?
Q 8	How to tell if my Power supply is with Active PFC function or not?
Q 9	Which standards do Seasonic PFC products comply to?
Q10	What 's Seasonic S²FC (Smart & Silent Fan Control)?
Q11	How smart is S²FC?
Q12	How silent is S²FC?
Q13	What's the difference between Seasonic S²FCand other "noise killers"?
Q14	What is the advantage for Universal Input?
Q15	What's the difference between Manual Switch, Auto Switch and Universal Free Input?
Q16	What's power supply efficiency?
Q17	What' forward converter?
Q18	The difference between Forward converter and half bridge circuit design
Q19	What's Seasonic Dr. Cable?
Q20	What's Magic bracket?
Q21	The heavier the PSU the better?
Q22	Connector introduction.
Q23	Phased-out product replacement list
Q24	Why remove -5V?
Q25	Form Factor introduction.
Q26	120 mm fan vs 80 mm fan
Q27	120 mm fan vs 2*80 mm fan
Q28	What is the difference between Seasonic and other PFC models?
Q29	What is the difference between Seasonic and other non-PFC models?
Q30	Competitor's model has independent lines for all the voltages, while most power supplies have a shared 3.3V, +5V and another for the 12V line. Is this an advantage?
Q31	What's the normal tolerance of a power supply's output voltage?
Q32	What should I do when my power supply suddenly shuts down?
Q33	I am not sure if the fan speed of my S12 is normal. What's the normal fan speed of the S12?
Q34	What's the difference between S12-500/600 & SS-500/600HT models?
Q35	Is it ture that longer is better for the length of cables?
Q36	What are the benefits of a power supply that is compliant with the latest Intel ATX12 V2.0 guideline?
Q37	Will an older-version power supply fitted with a + 24-pin main power adapter work as well as the new version - ATX12V2.0 power supply?
Q38	How can I tell whether a power supply is compliant with the latest Intel ATX12V v2.0 design guide?
Q39	What are the advantages of the new design of twisted wires in the Seasonic S12 series?
Q40	What's the 80 Plus Energy Efficiency Certification?
Q41	Why does the Seasonic power supply have an empty pin in the main power connector?
Q42	Power Supply Jump Start Guideline- To check if the PSU is functional?
Q43	PC systems consume ever more +12V power, and some power supplies provide multiple +12V outputs. Does that mean a larger number of +12V output rails is better?
Q44	Why does the 3-pin fan connector on my Seasonic power supply have only two wires?
Q45	How to use the “External Fan Control Output”?
Q46	What is DC to DC converter design for 3.3V and 5V lines?