Is that sound advice?I recommend alt tabbing in and out of a game to test what achieves the highest clocks. You will mostly need to focus on State 7 if you have +50% power limit enabled. Typically you will find that the highest voltage will give the highest clock speed possible clock speed, then you just increase frequency until you hit instability.
I alt+tabbed out of Overwatch and dropped my HBM clock from 1030 down to 1020. As I hit apply in Wattman, my PC crashed. It rebooted and Wattman restored the default profile, but I've been completely unable to to change any frequencies or voltages on the card since that happened. Instant crash. I assumed I had committed some complete amateur seppuku by adjusting clocks while a game was running in the background or something.