the compatibility between A PFC Psu and UPS

[katori142]

Hello everyone. I need to buy an ups for my pc. ( max 500 wat)  and my current target is an apc 1100 va.

My PSU is seasonic s12ii 520w with A.PFC supported

But i have heard about the incompatibility between a.PFC psu and non- true sin wave ( stepped sine wave) low cost ups that can cause pc to shutdown if the ups switch to battery power while the PSU is using lot of power ( when gaming, rendering )

It make me so worry, especially when i found this on internet: 

"Your computer uses a power supply that utilizes Active Power Factor Correction (Active PFC) to improve efficiency. Power supplies with active PFC may experience incompatibility problems with a UPS that does not provide pure sine wave power output when the power supply switches from AC power to UPS battery power. As a result, when a computer system using a power supply with active PFC is attached to a non-sine wave UPS, the system may shut down when it switches to battery power. Also, if the power supply continues to operate, it may produce a humming or high pitch noise while running on battery. This humming indicates the power supply is operating beyond specified tolerances and may damage the power supply."

 

So can anyone confirm for me that does the APC 1100 va line interactive work well with my  A PFC  seasonic s12ii 520 PSU or i need to find another UPS unit. and if so, what unit should i buy. I only have 100 - 120$ to invest on ups. 

Thank you everyone for reading. 

[SenKa]

Two big issues here:

 

Cheap PSU

 

Cheap UPS.

 

The S12II units are incredibly cheaply made, poor in design and very old. Theyre not fire hazards like some units, but I would replace it ASAP.

 

As for a stepped sine wave UPS, thats just yucky. A lot of high power electronics hate those things. I stop short of saying a cheap UPS would damage something like a computer PSU, but honestly I would never run a cheap UPS on anything I care about. May I ask why you feel a need for a UPS? Im not discouraging you, mere curiosity. 

[Guest]

1 hour ago, katori142 said:

"Your computer uses a power supply that utilizes Active Power Factor Correction (Active PFC) to improve efficiency. Power supplies with active PFC may experience incompatibility problems with a UPS that does not provide pure sine wave power output when the power supply switches from AC power to UPS battery power. As a result, when a computer system using a power supply with active PFC is attached to a non-sine wave UPS, the system may shut down when it switches to battery power. Also, if the power supply continues to operate, it may produce a humming or high pitch noise while running on battery. This humming indicates the power supply is operating beyond specified tolerances and may damage the power supply."

 

[katori142]

4 hours ago, SenpaiKaplan said:

Two big issues here:

 

Cheap PSU

 

Cheap UPS.

 

The S12II units are incredibly cheaply made, poor in design and very old. Theyre not fire hazards like some units, but I would replace it ASAP.

 

As for a stepped sine wave UPS, thats just yucky. A lot of high power electronics hate those things. I stop short of saying a cheap UPS would damage something like a computer PSU, but honestly I would never run a cheap UPS on anything I care about. May I ask why you feel a need for a UPS? Im not discouraging you, mere curiosity. 

I need ups because at my area , blackout occurs frequentlly maybe one or 2 time a week. I am not goimg to run my pc with ups for long time. I only wanna safely shutdown my pc immediately  when blackout occurs. It means when blackout occur the longest time my pc need ups is only about 30 secs. Enough to quit game and shutdown. But im wondering about the compability between ups and my psu. If the ups does overtake but right after my pc shutdown already, then buying ups becomes meaningless for me