Solved by smth in post #2 
              
              
                From my fairly up-to-date knowledge, NVLink doesn’t merge the GPUs into 1 logical GPU, I’ve never heard of this happen. Even for GPUs such as K80 where it’s 1 physical GPU, they split it into 2 logical GPUs in nvidia-smi / software. 
Maybe it merges the 2 GPUs into 1 logical GPU for gaming, such as …