Issues spotted in the DxDiag:
Older driver version.
Not enough free space on drive to keep Windows happy.
Running in background using resources.
Permission error, either on hard drive, GPU, or RAM.
The actual GPU timeout error (it repeats several times).
Known issue may be affecting you (more info below).
What to do about the errors:
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Install Display Driver Uninstaller and remove all GPU driver copies. Then, reinstall the latest version (you’re 3 months behind at the moment).
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Free up more space on your hard drive. Windows recommends ~10-15%, but I recommend at least 15%. Check the Windows Cleanup tool to remove old system files from previous Windows versions, which may free some space, or consider using a tool like CCleaner.
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Disable the Origin Web Helper service. It isn’t nice to your CPU anyway.
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Disable or uninstall any antivirus programs. If you’re only using Windows Defender, make sure Overwatch has the proper permissions/is whitelisted.
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Consider updating your BiOS. More info here: Known Technical Support Issues - #18 by Drakuloth