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Windows 7: Sleep causing i5 2500k core 0 to pin at 100%


19 Oct 2011   #1

Windows 7 Home Premium 64bit
 
 
Sleep causing i5 2500k core 0 to pin at 100%

OK so I have a problem with my system when I wake it from sleeping. Before going to sleep everything is fine and working the way it should but after waking it from sleep my core 0 is fully pinned at 100%. It seems to only happen when putting the system to sleep. Has this ever happened to anyone and if so what did you do to fix it?

Gigabyte Z68MA-D2H-B3, Gigabyte Radeon HD 6850, i5 2500k, 8G DDR3 ram, Windows 7 Home Premium 64bit

My System SpecsSystem Spec
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19 Oct 2011   #2

Windows 7 Ultimate x64, & Mac OS X 10.9.2
 
 

open control pannel and look at the running apps, both windows and services and look to see if any apps are using large amounts of cpu power.
My System SpecsSystem Spec
19 Oct 2011   #3

Windows 7 Ultimate x64
 
 

Does it drop back to normal percentages at some point?

It could be a system error in determining core usage. As in, it's not actually doing that, just reporting it.

What program are you using to test this out? You should take a look at the core temperature using a good reliable temp. monitor. If temps are low (similar to temps a few minutes after you boot) you know it's a usage reporting issue, not a CPU usage issue.

If the temperatures indeed do rise... someone savvy with hardware issues shall chime in.

Good luck!
My System SpecsSystem Spec
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19 Oct 2011   #4

Windows 7 Home Premium 64bit
 
 

No it does not drop to normal levels after a while of operation. I'm using CPUID Hardware monitor to watch temperatures. This happens everytime I put the machine to sleep then after I wake it up all of a sudden it's always that one core of the processor being run at a full 100% and it shows by the temperature increase. I've looked at all the processes and services and there is nothing else running other than system idle and kernel. I'm just a little baffled by this that's all. Everything runs great and I love Windows 7 but I think I'll just stick to shutting the system down instead of using the sleep function.
My System SpecsSystem Spec
27 Oct 2011   #5

Windows 7 Professional 64-bit
 
 

I have this exact same issue but with an I7-2600K, Asus P8Z68 Deluxe, nVidia GTX550ti and Corsair RAM. Task manager doesn't show any processes using up the core, i.e. System Idle Process is at 99% and nothing else is showing any CPU usage, but the graph on the Performance tab shows the core racing along. The temperature climbs too. Our systems are so different that it must be an issue with Windows and the Z68 and perhaps unlocked processors.

Any known fix?
My System SpecsSystem Spec
27 Oct 2011   #6
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

Hello all. Type resmon in the Start Search and hit enter, this will open Resource Manager. Go to the memory tab, look for large RAM users. You can sort each column by clicking it to bring the highest user to the top. report back what you find.
Als ocheck the drive tab to see if some process is doing a lot of reading/writing.
My System SpecsSystem Spec
27 Oct 2011   #7

Windows 7 Professional 64-bit
 
 

RESMON shows that "System Interrupts" is consuming allot of CPU time when this is happening.`
My System SpecsSystem Spec
28 Oct 2011   #8

Windows Server 2008 R2
 
 

So we have a misbehaving driver - it would be interesting to simply install Windows (and nothing else - no software, drivers, etc) and see if the problem persists there (is it a problem with a driver Windows ships, or one that was installed afterwards).
My System SpecsSystem Spec
28 Oct 2011   #9
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

Does anyone have game boosters, down loaders installed? They cause issues. Try reinstalling USB, graphics, and audio drivers. Use Phyxion.net - Driver Sweeper to uninstall them one at a time. Download the newer or the same driver and save to your desktop first to have it ready to install.

Thanks Carl.
My System SpecsSystem Spec
29 Oct 2011   #10

Windows 7 Professional 64-bit
 
 

Quote   Quote: Originally Posted by cluberti View Post
So we have a misbehaving driver - it would be interesting to simply install Windows (and nothing else - no software, drivers, etc) and see if the problem persists there (is it a problem with a driver Windows ships, or one that was installed afterwards).
I updated the BIOS and the Intel Rapid Store stuff, no change. I even tried with it running at normal clock speeds, nada. I then manually compared all the drivers in Windows with the ones available from Asus and updated the ones that had newer versions (Realtek gigabit, Intel video and perhaps the sound drivers). That fixed it. No more racing Core-0 after waking from S3 sleep. I don't know which driver it was, but it was one of them. Thanks for the input.
My System SpecsSystem Spec
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 Sleep causing i5 2500k core 0 to pin at 100%




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