Gpu clock

My gpu clock is high without using any large software.

Normal clock - 139-405 mhz
Whe i use photoshop or other software gpu clock normal get high

139-405 mhz to - 1290-3500 something or up.
It will not decrease suddenly take to much time.

In this image iam using premier pro without playing video it will get high or nothing use effect or anything.

Not decreasing
Same happend with other program.

Without using sometimes it will normal to high.
What happend .
Please help me

Sorry for not good english