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Overclocking / Undervolting information for Vega 56 or 64?

Here is a fast laundry record:

Record of device to make use of for overclocking and checking out
Wattman (and learn how to in finding and use it, like an summary, together with profiles)
Unigine Valley or Heaven (use this for speedy checking out whilst converting settings in Wattman and checking for balance / artifacts) …simply suggesting this
The best way to observe cores / mem speeds and temps all the way through checking out (I have noticed display screen overlays, and others the use of GPUz)

Step-by step overclocking in Wattman
Fan speeds
Energy prohibit
Temp prohibit
Core speeds
Reminiscence speeds