GNU/Linux Debian Bookworm Installing NVIDIA Quadro P600/P620 Driver Guide
How to Install NVIDIA Quadro P600/P620 Graphics Driver on Debian Bookworm 12.x desktop – Step by step Tutorial.
The NVIDIA Quadro P600/P620 Driver Debian Bookworm Setup is Simple and involves only the Execution of few Basic Shell Commands.
Moreover, following the NVIDIA Recommendations is better to use the tested NVIDIA Linux Graphics Driver from the Debian Repository.
Then with the nvidia-settings Tool you can configure Brightness, Gamma, XVideo attributes, Temperature, and OpenGL.
Especially relevant, prior to the Driver Setup you may consult:

GNU/Linux Debian 12 Quadro P600/P620 Driver Installation Guide