I did a deep dive into this when buying a UPS last year, and ended up with a sine wave ups. But just now I couldn't find my sources for why I made that choice.

I did a deep dive into this when buying a UPS last year, and ended up with a sine wave ups. But just now I couldn't find my sources for why I made that choice. I believe it was something to do with the new ATX 3.0 PSU standard. I did find this older thread[1], but the answer is more of a "maybe if your PC or server is using an active PFC PSU." However, this is out of date (2015), and may no longer be correct. Cyberpower's website says PSU with active PFC require pure sine wave.[2] But that might be marketing. IDK, seems like it something that may need to be tested to be sure. [1] https://superuser.com/questions/912679/when-do-i-need-a-pure-sine-wave-ups https://superuser.com/questions/912679/when-do-i-need-a-pure... [2] https://www.cyberpower.com/global/en/product/series/pfc_sinewave_gen._1 https://www.cyberpower.com/global/en/product/series/pfc_sine...