NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. (EE) Please also check the log file at '/var/log/Xorg.0.log' for additional information. I found your duplicate over at Toms Hardware: Lane G 23:26:03 According the manufacturer, it is PCIE 2. Please consult the The X.Org Foundation support 12:50:11 Lane, please dont copy paste your question to multiple forums. The 515.57 NVIDIA driver will ignore this (WW) NVIDIA(0): supported through the NVIDIA 470.xx Legacy drivers. (WW) NVIDIA(0): The NVIDIA Quadro K600 GPU installed in this system is Install EL8 based OS subscribed to ELRepo For Windows 7 64-bit, this driver recognizes up to the total available video memory on Quadro cards for Direct3D and OpenGL applications. We have supported hardware we will swap into this system, but have some clients who may be using the K600 in their systems. Download the Deutsch Quadro Desktop Driver Release 430 for Windows Server 2008 R2 64. On this particular system, the 515.57 drivers were installed, and the GUI is now inaccessible.

nvidia-detect 470.86 installed on a system with elrepo el8 reports 'kmod-nvidia', and in our environment, we use a configuration management system to take this output to determine what driver to install. It appears to be supported by 470.xx legacy drivers. The Quadro K600 is no longer supported and will not show up with the 515.xx drivers. Download the Japanese Quadro Desktop Driver Release 430 for Windows Server 2016, Windows Server 2019 systems. 0001247: nvidia-detect does not identify correct driver for NVidia Quadro K600

Nvidia quadro k600 drivers