CPU Usage High

Whether I boot Windows 7 normally, in diagnosics mode, or in safe mode, 3 minutes or so after startup
Task Manager/Performance reports one core working at 100% and another is nearly as high. CPU usuage
runs about 25 - 35% with no programs open. It's always the same cores.

At the same time, Windows Task Manager/Processes reports 90% of time the processor is idle. 10% is the
NT Kernel & System. Everything else is 00. Show processes for all users is checked. Don't these two
reports seem to be contadictory? :heink:

Today I checked the CPU fan. It's clean. I've reseated the CPU and applied new thermal compound. The
involved cores are running around 48C.

I've tried disabling Avast. No joy.

I've run Malwarebytes and BitDefender. No problems.

I've replaced the power supply.

The box is so fast, I can hardly tell there's a problem. Sometimes on audio, I get a few glitches now and


What else should I try to get rid of this wild core? :(


OS Version: Microsoft Windows 7 Ultimate, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i7 CPU 965 @ 3.20GHz, Intel64 Family 6 Model 26 Stepping 4
Processor Count: 8
RAM: 12279 Mb
Graphics Card: ATI Radeon HD 4870 X2, 1024 Mb
Hard Drives: C: Total - 199895 MB, Free - 111527 MB; D: Total - 953866 MB, Free - 885741 MB; E: Total -
753871 MB, Free - 552239 MB; H: Total - 715402 MB, Free - 75879 MB; J: Total - 1907726 MB, Free -
1241535 MB; L: Total - 953867 MB, Free - 235772 MB;
Motherboard: Gateway, TBGM01
Antivirus: Microsoft Security Essentials, Disabled
6 answers Last reply
More about usage high
  1. I dont think you have a problem
  2. If you haven't already, make sure windows is up to date with all the latest hotfixes. I remember reading about some devices or services causing this problem awhile back that was resolved with a hotfix.
  3. At idle your cores are going to be idle and they will not show any usage , I think you are looking for something that isn't there and even if you did have a "wild core" there wouldn't be anything you could do about it.
  4. This topic has been moved from the section Systems to section CPU & Components by Nikorr
  5. > Outlander_04: I dont think you have a problem.

    Hope you're right and the info in Task Manager is screwy.

    > brian19801: the latest hotfixes

    Got 'em all I believe.

    > inzone: will not show any usage

    The problem is that one is at 100% when there's apparently nothing going on.


    Thanks for all the responses. I'm just going to keep using the box and see what happens. :??:
  6. Time for an o/s re-install.
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