Intel Graphics HD4600, Windows 8.1 x64, Driver: 3379 - problem with GPU clock

[prock]

In my laptop I have Core i3 4000m with HD4600.

When i run gpu benchmark gpu clock goes to 1100MHz (it's fine), but if my system is in IDLE, gpu clock is 600MHz (it should be 400MHz).

I tested it with driers 3345 too and problem was the same.

How to fix this?

[prock]

Log from GPU-Z, i was waiting to my system hibernation (screen is off after 5 minutes): http://wklej.to/Tol36 http://wklej.to/Tol36