NVIDIA System Tools (previously called nTune) is a collection of utilities for accessing, monitoring, and adjusting system components, including temperature and voltages with user-friendly control panels within Windows, rather than through the BIOS. It is a freeware NVIDIA system monitoring application that's efficient, reliable and easy-to-use.
Here is a screenshot to illustrate the features and user interface of this application:
NVIDIA GeForce Now
ReShade
EXPERTool
GPU-Z
Display Changer II