GPU and memory clock stuck 17.9.2

No games are launched in this session, using firefox without hardware acceleration and Media Player Classic, GPU heating and have activity without reason. Once I noticed it when closed Skyrim after hour of gameplay, now it just video player.

 

Describe your system:

    AMD Graphics Card

        Radeon 7770 HD

    Desktop or Laptop System

        Desktop

    Operating System

        Windows 10 64bit 1703, updates

    Driver version installed

       17.9.2 Crimson

    Display Devices

       DVI Benq VW2220, 60Hz

    Motherboard + Bios Revision

       Gigabyte A88XMD3H F10

    CPU/APU

        Athlon II X4 840

    Power Supply Unit  Make, Model & Wattage

        Chieftech APS 550

    RAM

       8GB

 

Describe your issue:

    Provide a detailed description of the issue you are experiencing and the steps required to reproduce the issue. - Start app what using GPU acceleration, when close it, GPU and memory clock stay 400/1150.

    Details about applications/games affected (including version number) - Media Player Classic, Skyrim

    Graphical settings used in the application/game (resolution and 3D settings) - default crimson settings

    If possible, include a screenshot or video link of the issue - screenshot in attachment