"Rendering device lost" error persists after troubleshooting

Those two errors just say:

  1. the GPU stopped taking commands from Windows
  2. available RAM is low and Overwatch requires a large portion of what’s leftover

The full report is requested for all new tech support threads. I can check out an MSInfo if you want to link to one instead of post. Or you can wait for the ticket system.

Pinned at top of forum:

What to do if you Need More Help

Technical issues can be very frustrating to try to diagnose on your own. Fortunately we have both a helpful community and support staff who can help locate the problem with you. If you prefer to troubleshoot with the community/blue posters and see if anybody else is having similar issues, start a thread with this information:

For all technical issues:

  1. Create a text copy of your DxDiag using these instructions. Once you have that made, open the file. You’ll need to copy and paste the contents of the Text document into the post, and put four Tilde (~) marks above the DXDiag. It’ll look like this:
DXDiag goes here
  1. A list of any troubleshooting you’ve performed already.
  2. A description of what you’re doing when the problems happen, any error messages received, and what it ‘looks like’ to you when it happens.

Source: Common Technical Issues and Solutions - #30 by Drakuloth