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Hi, it's really on the limit I would say. Try to decrease the voltage a bit more or increase the fan. I would advice to stay below 85 degrees chip temperature for 24/7 usage.
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Hi thanks for your tips. Right Now my D3 run with 40% fan, Freq 400 and voltage at the "lowest" setting. The chip temperature are 84 85 and 87. Can I still decrease the voltage setting ? because I thought "lowest" is the lowest setting for  voltage.