This feature should increase MH/s and reduce power consumption, and temperature; but is known to worsen performance in a small number of cases.
Mining should already be enabled
If you haven't set it up yet, please check out this document.
To turn on automatic Optimized Safe Settings
Go to crypto dashboard
To enable OC, turn on the toggle for Optimized Safe Settings
To disable OC, turn off the toggle for Optimized Safe Settings
This will be applied to all machines that has no GPU Overclocking Profile (or Profile is set to Auto)
If you some machines are going black screen when this is enabled, please disable Optimized safe settings, the driver could be crashing.
Try updating the GPU drivers
Try disabling Optimizations
Or set a custom GPU profile on this machine
To set GPU Overclocking profiles just click on the gear button.
Please refer to this article for more info.