anybody have an rtx 5000 laptop gpu running on windows 10 ltsc?

I want to upgrade from a 4090 laptop to 5090 to run larger video diffusion models. I've been using 10 ltsc for the last couple years, I downgraded a lenovo legion 7i, but after installing drivers the gpu cannot be recognized properly. reinstalling 11 fixes the issue, I think likely lenovo laptop vga drivers are broken on 10. some desktop threads mention issues with PCie gen 4/5 on windows 10, but laptop bios has no configs for this