In my experience its generally not possible with GeForce products. The GPU driver decides what performance state to put the GPU in according to its own heuristics.
For enterprise/data center products, you can “lock” the performance behavior to some degree following instructions like this.
There are a few other threads on these forums with related questions/information. Here are a few:
1 2 3. There are others as well that you can find with a bit of searching.