I have a headache from searching for solution of my problem.

Everytime when I open Google Chrome and any YouTube video (doesn't matter if Flash or HTML5), system process named "NT Kernel & System" goes to costume about 17% of all my CPU performance.

It assumes to 100% of 1 core of all 8 cores.

enter image description here

When I close the YouTube tab, the process immediatelly drops to 0~2% which seems to be OK.

PC specs:

  • ASUS R500V
  • Intel Core i7-3610QM @ 2.30 GHz
  • 8 GB RAM

SW:

  • Windows 7 SP1 Home Premium 64-bit
  • Google Chrome 40.0.2214.91 m 64-bit

And in the last stats from Chrome task manager:

enter image description here

  • capture a xperf trace of the high CPU usaage (30 - 60s): pastebin.com/4h2ySm1V and share it. I'll take a look at it and try to tell you what is wrong. – magicandre1981 Jan 25 '15 at 8:05
  • Thanks for instructions, here is the file: mega.co.nz/… I'm not sure if I did it right but hope so. Please let me know.. Thanks. – Martin Jan 26 '15 at 12:15
  • the trace is corrupted. Set the value after -buffersize to 4096 and capture a new trace. – magicandre1981 Jan 26 '15 at 16:14
  • Ok next try: mega.co.nz/… – Martin Jan 26 '15 at 17:10
  • the trace is too short (only 8seconds). HEre the system uses 1.8% and this is fine. Capture a new one which shows the high usage and also close the YT tab to show the drop in CPU usage – magicandre1981 Jan 27 '15 at 5:47
up vote 5 down vote accepted

I think I solved it.

I unchecked "use hardware acceleration when available". Now it's everything faster and consumes lower CPU.

enter image description here

  • 1
    report this issue in the Chrome Bugtracker, so that the Chrome Team can fix it. – magicandre1981 Jan 31 '15 at 15:36
  • I can confirm the fix as well. – FailedDev Jun 9 '15 at 8:12

Had same problem with Win7 Pro.
I uninstalled Intel® Rapid Storage Technology drivers and the problem was solved.

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