A few users were encountering a "cudaErrorIllegalAddress" issue with XPU on NVidia GPUs. NVidia has identified the issue and fixed it in the latest 537.13 driver. It would be great to hear back from some affected users to know if 537.13 indeed does fix any issues they were having. Setting any environment variables should not be necessary with this new driver.
Please note this is a Windows driver version, I'll report back soon on what the equivalent Linux driver is.
thanks