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Installing FAQ

Q1: Where is the 115V/230V switch? I had it on my old PSU and now I’m afraid that I can burn my new Seasonic PSU by plugging it to wrong wall outlet.

A1: All Seasonic Power Supply Units have built-in APFC module and support Full Range of wall outlets with 115~230 V and 50~60 Hz. You don’t need any manual switches to plug and run safely your Seasonic PSU anywhere in the World.

 

Q2: I have old motherboard with 20-pin connector. Can I use Seasonic PSU or not?

A2: All ATX and Flex-ATX Seasonic power supply units are designed to work with latest systems and therefore support 24-pin motherboards. Depending on series and revision some (but not all) models have combined 20/24 pin connectors, which will work with old motherboards. So if you need 20-pin connector option, please, contact your retailer or check it in shop before buying.

 

Q3: Should I connect modular cables before or after installing my new Seasonic PSU?

A3: Before connecting modular cables, make sure that your PSU is turned off and disconnected from wall outlet. Decision when to connect modular cables – before or after installing your PSU into PC case – is up to you. Sometimes (usually in small PC cases) it’s easier to connect cables before installing PSU.

 

Q4: Is there possibility of incorrect connection of modular cables? Can such connection damage PSU and/or my PC?

A4: All modular cables and respective slots on PSU are signed and at most have different configuration, so it won’t be hard to connect them properly. But in some cases users actually can connect cables into wrong slots, which can damage PC or PSU after turning them on, despite all protective features that we implement in our production. To avoid that, please, don’t apply excessive force while connecting modular cables and double-check cable labels before connecting PSU to wall outlet.

Note: Do not plug 6+2 pin PCI-E connector to CPU 8-pin slot (usually suited on motherboard near CPU socket). You should plug there CPU 8-pin or CPU 4+4-pin connector. Otherwise your PC or PSU may be damaged.

 

Q5: SATA and PATA (Molex) modular connectors on my Seasonic PSU are not divided and have the same configuration. How can I connect them properly?

A5: SATA and PATA (Molex) have equal voltage and differ only by shape of device connector (SATA is flat with 1 thin hole and PATA is thick with 4 holes). Therefore SATA and PATA cables are fully compatible.

 

Q6: My PSU has “Fan Control” switch with 2 positions – “Hybrid” and “Normal”. What’s the purpose of this switch? What position should I choose?

A6: New generation of high-efficient Seasonic power supply units has inherited advanced Hybrid Fan Control System, which keeps the fan inactive under low operating loads. Higher efficiency of new PSUs made it possible to keep the fan inactive even longer (up to 40% operation load), but in some systems (especially in small PC cases) PSU fan is critical for overall cooling. For that reason Seasonic added “Fan Control” switch, which allows users to choose “Normal” mode and have PSU fan running and pull warm air off the PC case no matter what current load is.

 

Q7: We just received bulk power supply units and figured that there are no AC power cords and mounting screws. Is this normal?

A7: Yes, vast majority of bulk Seasonic power supply units are provided without any additional items. PC assemblers should order AC power cords and mounting screws separately. Modular Seasonic power supplies have modular cables bundled.

Note: Seasonic rackmount power supply units have bundled mounting plate and screws to attach it to PSU. For more details, please, contact us or our partners.

 

Q8: How should I install my Seasonic PSU, if my PC case has PSU rack it the top part? What if PSU rack is in the bottom of my PC case?

A8: When PSU rack is in top part of case, please, install it with fan facing downwards.

If you have a large gap between PSU and the top cover of case, or there is special ventilation grill, it is also possible to install your PSU with fan facing upwards. But note that in this position your PSU fan won’t extract any hot air from your PC case.

If PSU rack is on bottom, install PSU with fan facing upwards. If you have a large gap or a ventilation grill there too, you can also install your PSU with fan facing downwards.

 

Q9: Are there any special requirements for Seasonic Fanless power supply units installation?

A9: Yes, while installing Seasonic Fanless PSU into your PC case, you should follow three simple rules:

  • The biggest ventilating grill (where other PSUs usually have 120 mm fan) should be facing upwards. This would be easy, because Seasonic Fanless power supplies have two sets of mounting holes;
  • There should be some free space and holes/grill above PSU to let warm air flow out;
  • Keep in mind that hot air won’t be pulled from PC case by PSU fan and therefore you need to plan your PC cooling accordingly.

Note: Applying those rules for semi-passive power supply units (with Hybrid Silent Fan Control or S3FC cooling systems) is not necessary. All those models have thermal control which will turn on PSU fan when it will be needed and won't allow PSU to overheat.


Q10: I have accidently damaged warranty seal while installing my Retail PSU. Is my warranty void now?

A10: Usual scratches won’t affect your warranty and it is extremely hard to damage our Retail warranty seal to make it seem like PSU was opened (unless someone really opened it). To do so you actually need to remove the screw under the seal or attempt to remove the seal itself. Alas, in this case your warranty definitely will be void.

 

Q11: Will my new Seasonic PSU work with UPS? How powerful should be my UPS?

A11: All Seasonic power supply units perfectly work with Online and Standby UPS and majority of Line-interactive UPS, providing up to 70~80% of their maximum Wattage. But some rare combinations of Seasonic power supplies and Line-interactive UPS might be working only at 50% of PSU’s max Wattage or be completely incompatible. The only way to be 100% sure is to check it with your UPS. As for the UPS Wattage, we recommend you to have it about 50~100% higher than your PSU Wattage.

 

Note: Avoid any operation with PSU and within your PC when AC power cord is attached to wall outlet. Most of Seasonic power supply units are always live when plugged in.

Installing FAQ

Q1: Where is the 115V/230V switch? I had it on my old PSU and now I’m afraid that I can burn my new Seasonic PSU by plugging it to wrong wall outlet.

A1: All Seasonic Power Supply Units have built-in APFC module and support Full Range of wall outlets with 115~230 V and 50~60 Hz. You don’t need any manual switches to plug and run safely your Seasonic PSU anywhere in the World.

 

Q2: I have old motherboard with 20-pin connector. Can I use Seasonic PSU or not?

A2: All ATX and Flex-ATX Seasonic power supply units are designed to work with latest systems and therefore support 24-pin motherboards. Depending on series and revision some (but not all) models have combined 20/24 pin connectors, which will work with old motherboards. So if you need 20-pin connector option, please, contact your retailer or check it in shop before buying.

 

Q3: Should I connect modular cables before or after installing my new Seasonic PSU?

A3: Before connecting modular cables, make sure that your PSU is turned off and disconnected from wall outlet. Decision when to connect modular cables – before or after installing your PSU into PC case – is up to you. Sometimes (usually in small PC cases) it’s easier to connect cables before installing PSU.

 

Q4: Is there possibility of incorrect connection of modular cables? Can such connection damage PSU and/or my PC?

A4: All modular cables and respective slots on PSU are signed and at most have different configuration, so it won’t be hard to connect them properly. But in some cases users actually can connect cables into wrong slots, which can damage PC or PSU after turning them on, despite all protective features that we implement in our production. To avoid that, please, don’t apply excessive force while connecting modular cables and double-check cable labels before connecting PSU to wall outlet.

Note: Do not plug 6+2 pin PCI-E connector to CPU 8-pin slot (usually suited on motherboard near CPU socket). You should plug there CPU 8-pin or CPU 4+4-pin connector. Otherwise your PC or PSU may be damaged.

 

Q5: SATA and PATA (Molex) modular connectors on my Seasonic PSU are not divided and have the same configuration. How can I connect them properly?

A5: SATA and PATA (Molex) have equal voltage and differ only by shape of device connector (SATA is flat with 1 thin hole and PATA is thick with 4 holes). Therefore SATA and PATA cables are fully compatible.

 

Q6: My PSU has “Fan Control” switch with 2 positions – “Hybrid” and “Normal”. What’s the purpose of this switch? What position should I choose?

A6: New generation of high-efficient Seasonic power supply units has inherited advanced Hybrid Fan Control System, which keeps the fan inactive under low operating loads. Higher efficiency of new PSUs made it possible to keep the fan inactive even longer (up to 40% operation load), but in some systems (especially in small PC cases) PSU fan is critical for overall cooling. For that reason Seasonic added “Fan Control” switch, which allows users to choose “Normal” mode and have PSU fan running and pull warm air off the PC case no matter what current load is.

 

Q7: We just received bulk power supply units and figured that there are no AC power cords and mounting screws. Is this normal?

A7: Yes, vast majority of bulk Seasonic power supply units are provided without any additional items. PC assemblers should order AC power cords and mounting screws separately. Modular Seasonic power supplies have modular cables bundled.

Note: Seasonic rackmount power supply units have bundled mounting plate and screws to attach it to PSU. For more details, please, contact us or our partners.

 

Q8: Are there any special requirements for Seasonic Fanless power supply units installation?

A8: Yes, while installing Seasonic Fanless PSU into your PC case, you should follow three simple rules:

-          The biggest ventilating grill (where other PSUs usually have 120 mm fan) should be facing upwards. This would be easy, because Seasonic Fanless power supplies have two sets of mounting holes;

-          There should be some free space and holes/grill above PSU to let warm air flow out;

-          Keep in mind that hot air won’t be pulled from PC case by PSU fan and therefore you need to plan your PC cooling accordingly.

 

Q9: I have accidently damaged warranty seal while installing my Retail PSU. Is my warranty void now?

A9: Usual scratches won’t affect your warranty and it is extremely hard to damage our Retail warranty seal to make it seem like PSU was opened (unless someone really opened it). To do so you actually need to remove the screw under the seal or attempt to remove the seal itself. Alas, in this case your warranty definitely will be void.

 

Q10: Will my new Seasonic PSU work with UPS? How powerful should be my UPS?

A10: All Seasonic power supply units perfectly work with Online and Standby UPS and majority of Line-interactive UPS, providing up to 70~80% of their maximum Wattage. But some rare combinations of Seasonic power supplies and Line-interactive UPS might be working only at 50% of PSU’s max Wattage or be completely incompatible. The only way to be 100% sure is to check it with your UPS. As for the UPS Wattage, we recommend you to have it about 50~100% higher than your PSU Wattage.

 

Note: Avoid any operation with PSU and within your PC when AC power cord is attached to wall outlet. Most of Seasonic power supply units are always live when plugged in.