Just learned this from my AI assistant.
The Chicony Corp 750W power supply with part number FT44X is used in Dell computers. However, specific hold time details for this particular model are not readily available in the search results. Generally, high-quality power supplies like those from Chicony have hold times around 16-20 milliseconds, which is typically sufficient to bridge brief power interruptions.

A few observations
1. I'm not sure why the hold time is such a " big company trade secret", isn't it simply a matter of how much capacitance you design in??

2. If 16-20ms is a valid range, then I'm happy with that.

3. I wonder if the power supply people are in any communication with the UPS people to ensure that together crash protection is possible/likely. Perhaps thru an international industry trade group of some sort.

Regarding lightning strikes, I had a whole-house surge protector wired in a few years ago. No problems before, no problems after.

And regarding "Sinewave" technology. I would have thought this is your daddy's technology and that any UPS would have it as a default. Much like solid-state electronics. I guess buyer beware.

https://soundcloud.com/user-646279677
BiaB 2025 Windows
For me there’s no better place in the band than to have one leg in the harmony world and the other in the percussive. Thank you Paul Tutmarc and Leo Fender.