New MBP 15" (2.4Ghz) Late 2011 CPU monitor problem?

Discussion in 'MacBook Pro' started by techman28, Nov 4, 2011.

  1. techman28 macrumors member

    Jun 18, 2010
    I just got a new late 2011 2.4ghz macbook pro 15". It has the quad core i7. I opened up Activity Monitor so I could set its dock icon to show CPU usage. When I did, it only showed 1 bar instead of 4 (1 for each core). I then clicked command+2 to view the separate cpu usage window and it showed 8 bars (for 8 cores). Now only 4 of the were showing activity, bars 1,3,5,and 7 were active and 2,4,6,and 8 weren't.

    I then installed istat pro widget and it also shows 8 cores in cpu usage bars but again only 4 active.

    I know this is only a quad core cpu and in the System Information it confirms it. So why are these CPU usage apps showing 8 bars? The only reason I care is because since it thinks it has 8 cores, I cant set the activity monitor icon to show the cpu usage for the 4 individual cores.

    Does anyone now why this is happening and/or how to fix it? Is this happening to other people with the new late 2011 15" macbook pro (2.4ghz)? Thanks.
  2. WAM2 macrumors 6502a


    Jan 6, 2011
    United States
    It has 8 threads. When your not using something that doesnt take advantage of the extra threads nothings going to happen with them. 4 Cores, 8 threads. The Dual Cores have 4 threads.

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