CPU doesn't throttle down when idle

[slownera]

I have a Core i5 750.
MSI GD65 motherboard.
Settings default no overclock.

In windows my power settings are at default.
When in balanced mode my cpu doesn't throttle down.
CPU-z shows that the multiplier is around 20-23 en core clock 3Ghz.

I looked at the individual settings Processor management is as follows min CPU at 5% / max CPU 100%

But is doesn't throttle down.

When I switch power plan to max Power saving it does clock down to multiplier x9 (core 1,2Ghz). But I notice that it doesn't throttle to full power when under load.

Anyone any suggestions?
In the BIOS Intel speedstep is enabled. S3 powersaving is also enabled

 

[richc46]

Type task manger in search menu, by start and see what is using CPU.

 

[slownera]

All processes are idle. So no process that really stands out.
Windows is a fresh install so not much additional software except for windows updates.

The weird thing is that CPU does throttle down when in power savings mode not in Balanced.

I checked both CPU range settings in Balanced and Power Saving modes and they are identical.
min CPU 5% and max CPU 100%