GeForce 3080 cuda 9.2 compatibility

I want to get a new laptop with a real good gpu but I want To make sure that it will comparable with a older version of cuda.

Does a 3080 gpu support cuda 9.2?

It depends what you mean by, “Does a 3080 gpu support cuda 9.2?”

If you mean, “Can I run applications built with Cuda 9.2?”, then the answer is yes.
If you mean, “Can I install Cuda 9.2 and build Cuda applications using it?”, the answer is no. The RTX 3080 is an Ampere Compute 8.6 device and is only able to use Cuda >= 11.1 in this scenario.

See: Best Practices Guide :: CUDA Toolkit Documentation