To analyze your device’s GPU usage by Windows 8 please follow these simple steps:
1. Download Process Explorer from Microsoft and install as usual.
2. Run the Process Explorer as Admin by right-clicking on the Icon on Start Screen and on the App bar below elect to run as Admin. You need to do this to see the GPU readouts.
3. Click on any of the Graphs on the toolbar, System Information opens:
4. Select the GPU tab and Click the Engine button. GPU Engine History screen opens:
Run any Graphic intensive application or just use Windows 8 as usual and come back to see your GPU usage history.