GPU-Z is a PC graphics diagnostic and monitoring utility, which gives you up to date information of the GPUs installed in your system, and lets you monitor their clock speeds, temperatures, fan-speeds, voltages, dedicated memory usage, among other things ...
Supports NVIDIA, AMD, ATI and Intel graphics devices
Displays adapter, GPU and display information
Displays overclock, default clocks and 3D clocks (if available)
Includes a GPU load test to verify PCI-Express lane configuration
Validation of results
GPU-Z can create a backup of your graphics card BIOS
No installation required, optional installer is available
Support for Windows XP / Vista / Windows 7 / Windows 8 / Windows 10 (both 32 and 64 bit versions are supported)
On one hand, you'll have all of the hardware's technical information: GPU model, integration technology, quantity and frequency of the internal memory, type of bus it’s connected to and bandwidth.
On the other, you'll be able to see its internal status in real time, especially useful if you have some type of overclock on the card, so you can measure GPU temperature, frequency, fan speed, and voltage; you can also save all of this monitoring report in an external text file so you can analyze the data at a later time.