Regardless, it’s a fairly straight-forward issue: The only real way to know if an OC is successful on Vega, as of today, is to validate with performance. We’d suggest running a synthetic test (FireStrike GFX 1 & 2 are good) between each attempted overclock. Take note of the score versus the overclock, noting that scoring has some variance test-to-test, and then determine at what point the score stops increasing. It is possible that the score will decrease once crossing the threshold into broken clock territory, which is a clear sign that an OC isn’t doing anything.
GPUz, WattMan, Wattool, and Afterburner all report the same clock, and will all report what’s typed in without the number necessarily being true. Drivers will typically crash with an invalid or unsustainable clock, but we haven’t experienced many of the usual driver crashes as a result of clock tuning. That’s where it can get deceptive to the user – without a crash or hard fault, it appears as if the OC is applied and functional.
Again, just validate that performance versus a known baseline to plot improvement. If improvement ceases, the OC is no longer applying properly.
Just a PSA for anyone overclocking or reading/viewing overclocking content.