Try to deactivate the Traffic. Worked for me.
Look at this Thread:
scroll down to my settings. Hope it helps.
For information:
I would never overclock anything on the power supply or on the hardware. No way. If the PC is factory-set to OC, … ok. But never do it yourself if you don’t really know what you’re doing. especially not the RTX3080 which already has enough power for all current games