GPU is an acronym for graphics processing unit and it is a specialized microprocessor which is meant to offload or accelerate the 3D and 2D graphics rendering from the microprocessor.
GPU managers will allow users to monitor its temperature, thus being able to take action when it overheats so as to not cause damages.
Additionally, users will be able to use these applications for collecting detailed information regarding the GPU.
Also, they will also have the possibility to overclock it or to apply benchmarks tests to the GPU, however these actions should only be performed by expert users.