Overclocking / Undervolting information for Vega 56 or 64?
Here is a fast laundry record:
Listing of instrument to make use of for overclocking and trying out
Wattman (and tips on how to in finding and use it, like an summary, together with profiles)
Unigine Valley or Heaven (use this for fast trying out whilst converting settings in Wattman and checking for steadiness / artifacts) …simply suggesting this
Find out how to observe cores / mem speeds and temps all the way through trying out (I have observed display screen overlays, and others the usage of GPUz)
Step-by step overclocking in Wattman