I have SYS-4029GP-TRT2 using RTX8000 with Ubuntu 18.04 OS, in nvidia-smi, I am getting error 'NVRM: API mismatch: the client has the version 440.100, but this kernel module has the version 440.82'
Please try installing the 440.100 driver from Nvidia webpage.
https://www.nvidia.com/Download/Find.aspx