I've been experimenting a bit with undervolting but in the end this particular card seems to be at it's best with a "classic" OC of +150 on the core and +500 on the memory. It boosts up to 2130mhz in some games, and I have yet to see it exceed 62c under heavy load. These Asus coolers are quite impressive !
The Asus tuf cooler is insane, yep! No wonder the next gen will have an even higher power draw...
About undervolting:
To really see if it's better or worse, you would need to monitor the load, the frequency and the power limit marker in a time plot.
The cards can run very high MHz without running into the power limit if the gpu load isn't high enough to need full power.
But you won't see lower fps with lower MHz, since the gpu load has enough headroom.
You basically just waste energy in this scenario.
Undervolting would save energy in this use case.
Then there's the full gpu load scenario, where I bet the card will run a lot lower MHz due to hitting the power limit.
So your +150 clockspeed makes no difference. Even worse, the +500 on the memory might increase the power draw, leading to even lower clockspeeds and lower fps in the end.
In this case undervolting would result in a lower power draw, putting the power limit at a higher clockspeed and therefore increasing fps.
So 2 use cases for undervolting:
- Saving energy when you don't need the full performance of the gpu
- reducing the power draw while also increasing the clockspeed to gain performance
You can easily test this with hwinfo64 or msi afterburner:
Find a game that causes more than 95% gpu load (95 seems to be the maximum for my 3080 sometimes when no dlss, no RT are used and/or I'm recording something).
Then look at the power limit marker. "0" and "1" in afterburner, "yes" in hwinfo64.
If it's hitting the power limit, check the clockspeed.
Any clockspeed above this value won't result in more fps in almost every game.
It depends on how the games uses the card though. You can have different clockspeeds while hitting the power limit. But the difference isn't big.