GPU Switching Between 100% and 0% Periodically

Hello every one

My GPU runs between 100% to 0% periodically. About 30% duty cycle, 30 second period. The game runs normally during on cycle, and completely froze during off cycle.
CPU usage is about 40%.
This problem disappeared in one particular version but came back with the current version updates.
Does anyone see this issue before?
捕获