Crosshair V Formula Z FX9590 monitor sleep Idle Behavior

[jetoutant]

:confused:
I have been running my PC for about a week now testing out different cooling set ups and liquid cooling devices and finally have good temps
Now I am looking at other things and noticed that my CPU usage would throttle up and down continuously when the Monitor goes to sleep it is a fresh windows 7 ultimate 64 bit install with just a small hand full of games and some standard software that should not cause this issue and all the Bios settings are left at stock and is up to date


I notice the CPU usage on my Logitech G15 Keyboard LCD screen and the fans also throttle up and down with CPU usage

any one have any ideas that might help before I go on to do some overclocking and tweaking settings

[Heini]

Which gpu and drivers are you using? I don't know about throttling but I have to do a ctrl/alt/del to get from a "black screen" when I wake my monitor when using AMD cards but not with nVidia cards.

[Zka17]

Throttling is not a good thing, it means that your CPU slows down because of overheating...

But I assume you didn't meant that, since you said your temps are OK... you just meant that your CPU speeds up and slows down when you're not doing anything on your system - right?

If so, that's normal... you always have some background activity... and perhaps all of your power saving features are enabled - that is causing the CPU to slow down and use less power... then, when the CPU is doing something, it will speed up to the set frequency...

[jetoutant]

GPU Sapphire Dual-X AMD Radeon HD 7850 OC

yeah the CPU speeds up and slows down when the computer has put the monitors to sleep and the computer is sitting idle

I believe all my power saving settings are off not 100% sure on that though cool n quiet I know was disabled by the model of CPU I am using though because of the power consumption required for it to operate

some one told me it might be Windows 7 doing some indexing in the background at idle it should last about a week or so then it will stop it suppose to optimize windows so it runs quicker

Good news is I have overclocked it to 5 GHz and it is running stable temps look good so far from the few games I jumped into for about 30 min each

[Zka17]

You have power saving options both in BIOS and OS - for this later one check the Power Options...

[jetoutant]

All the power saving options are disabled in BIOS and the Windows 7 options are set to high performance
CPU still speeds up and down when monitors go to sleep and the system is at rest

[Zka17]

Nah, you don't have to do that... you'll turn your system into a heating unit... - but if that's you after, double-check the options at the High Performance...

[jetoutant]

Well I exchanged the motherboard for another and still get the same issue all power options seem to have good settings

[Zka17]

Mate, as said before, that is a normal behavior... why do you want to have your CPU at max speed and voltages even when it's in idle? It will ramp up when it's needed...

Can you post images of your BIOS settings - what features did you enabled/disabled there?

[jetoutant]

The CPU is not set to max at idle, sorry if I have been confusing.

Motherboard BIOS is at optimum defaults

Windows power setting is set at high performance modified to put the monitor to sleep after 10 minutes of no use and to put the entire system to sleep in 1 hour.

AMD Catalyst Control Center CPU power settings CPU speed is set to use 50% to 100% as needed so the system does not use CPU at max all the time.

In BIOS the APM is set to auto SVM and C6 state are enabled by default

Like I said the issue is when the computer puts the monitors to sleep the CPU USAGE will go up and down the fan get louder and faster because the CPU USAGE up and down brings temp up when I wake the monitors the CPU temp is at 46c

there are no updates happening there are no scheduled task set yet and there is no virus scan happening