By default your GPU should use a voltage-frequency curve that makes the card fully stable. Typically however there is a very big margin allowing the frequencies the card runs at to be drastically increased. To do so download msi afterburner and click "control" and "F" on the keyboard.
As we see here the frequency could be increased 300mhz at low voltages but just 90mhz at high voltages. This will be different with another card even if it's the same model, you are only guaranteed stability at stock settings.
Typically the voltage and frequency of an nvidia card will fluctuate based on how much power the card uses. That power-limit can be changed up to some maximum.
The voltage-frequency curve will also be affected by temperature. For that reason you want to achieve a stable temperature by using a steep custom fan-curve (such as between 76 and 86 °C).
Stability testing
You can lock the card at one particular voltage & frequency by pushing Control L. You can also just run the card as normal and use geforce experience to monitor the frequency of the card, then if it crashes you see what the unstable frequency was and you then need to adjust that.
In order to test the stability at the higher voltages you should maximize the power-limit, that however is often not enough to test the full curve. What you will probably need to do is to decrease the resolution (such as via DLSS) so the game will be unable to load all GPU-cores, if the game remains GPU bound the frequency of the card will be pushed up due to the boosting headroom.
You can verify that the game is GPU-bound by looking at the GPU-power, if it is at the maximum you are GPU-bound even if your GPU-utilization is 25%.
Capping the voltage
As you see there is diminishing returns when it comes to higher frequency from higher voltages. It might not be worth the extra power-consumption just to get 2fps more. It is worth noting that the GPU will try to finish each frame as fast as possible even if you are CPU/monitor bound and this can result in the voltage and power consumption being needlessly high.
To cap the voltage just flatten the curve and this will limit how high the voltage can go.
Here the voltage will not go above 832 mv.
What you probably want to do is to save 3 to 5 msi afterburner profiles that uses different voltage-caps, you can switch between these profiles depending on what games you play. When you want the best performance you select that profile.
https://youtu.be/xymefjRSNvI?t=314
As we see here the frequency could be increased 300mhz at low voltages but just 90mhz at high voltages. This will be different with another card even if it's the same model, you are only guaranteed stability at stock settings.
Typically the voltage and frequency of an nvidia card will fluctuate based on how much power the card uses. That power-limit can be changed up to some maximum.
The voltage-frequency curve will also be affected by temperature. For that reason you want to achieve a stable temperature by using a steep custom fan-curve (such as between 76 and 86 °C).
Stability testing
You can lock the card at one particular voltage & frequency by pushing Control L. You can also just run the card as normal and use geforce experience to monitor the frequency of the card, then if it crashes you see what the unstable frequency was and you then need to adjust that.
In order to test the stability at the higher voltages you should maximize the power-limit, that however is often not enough to test the full curve. What you will probably need to do is to decrease the resolution (such as via DLSS) so the game will be unable to load all GPU-cores, if the game remains GPU bound the frequency of the card will be pushed up due to the boosting headroom.
You can verify that the game is GPU-bound by looking at the GPU-power, if it is at the maximum you are GPU-bound even if your GPU-utilization is 25%.
Capping the voltage
As you see there is diminishing returns when it comes to higher frequency from higher voltages. It might not be worth the extra power-consumption just to get 2fps more. It is worth noting that the GPU will try to finish each frame as fast as possible even if you are CPU/monitor bound and this can result in the voltage and power consumption being needlessly high.
To cap the voltage just flatten the curve and this will limit how high the voltage can go.
Here the voltage will not go above 832 mv.
What you probably want to do is to save 3 to 5 msi afterburner profiles that uses different voltage-caps, you can switch between these profiles depending on what games you play. When you want the best performance you select that profile.
https://youtu.be/xymefjRSNvI?t=314