Whole system crashing while playing Mass Effect 1 Legendary Edition?

@SSV_Enterprise  I haven't seen any other reports quite like this, although that doesn't mean no one is reporting them anywhere.  But the game should absolutely not crash your entire system.

What power supply are you using?  A straight restart is often related to a bad or underpowered PSU.

It's also worth doing some hardware monitoring.  Download hwinfo from here:

https://www.hwinfo.com/download/

You don't need to install anything if you don't want to; just choose the Portable version, unzip it, and launch it from Downloads or wherever you want.  (If you would like to install, be sure to click the green button, not the orange one.)  Restart your computer, and don't open any other apps.  Launch hwinfo, choose "sensors only," and click the icon that's a sheet of paper with a + sign to start logging.  Save the file to your desktop for easy access later.

Wait five minutes, then launch the MELE and play until your system crashes.  The log should be intact up until that point, but please let me know how long you ran hwinfo before the crash—if the log is cut off, that's also useful information.  You can upload the log to a third-party free filehosting site and link it here.  Please leave it in .csv format, or if you use OneDrive to share, please compress it in .zip format instead.

Swap out your other video card, And run the game.  Sometimes a faulty video card will crash an entire system like that.  Of course an underpowered pc will also do that.  Power supplies will fail intermittently sometimes, And shut you down.

Thanks for the replies. I saw in another thread that someone having performance issues in ME1LE resolved it by turning off Corsair's iCue utility. I had iCue running in the background because I have a Corsair AIO and RAM, and an out of date version at that. So I both updated it and closed it out while playing. And of course there was the patch on Monday that supposedly improved performance, so that could have helped. Played a whole bunch Monday and yesterday - performance is still janky on uncharted worlds, but I played without any crashing. So I'm hoping the issue is resolved, I'll give it a week before I mark it as such.