Sounds either like a temp issue or a power issue.
- what are the temps during heavy load?
- make sure the fans are spinning
- make sure you don't use daisy chained cable
- your PSU watt?
- did you do CMOS reset?
- did you do tests with other gpu to make sure the PSU is ok?
- try rebar on and off
- uninstall Adrenalin and reinstall drivers only. Then install Afterburner to set fans etc.
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• Minisforum um790 Pro • 65" TV (HDMI) • Sony 5.1 audio (toslink)