I am just testing card. I will buy more if it run stable.
There is no error on claymore log file. already tried restarting.
I did not changed anything on afterburner. just updated gpu bios with polaris's one click auto setup.
claymore & afterburner screenshot:
https://prnt.sc/hlhglbWhich driver are you using? It is possible that at night the system automatically updated the driver to the graphics card and the speed fell.
For the best result, in addition to changing BIOS timings, you still need to configure the card in OverdriveNTool. This will increase the hashrate and reduce the power consumption of the graphics card.