Are there two different types of processors used in the 13.3" 2.26 ghz MBPs?

Discussion in 'MacBook Pro' started by zoziw, Sep 14, 2009.

  1. zoziw macrumors member


    Feb 19, 2006
    I have been trying to figure out which Intel processor is used in the 13.3" 2.26 ghz MBP (the one I just purchased).

    The Wikipedia entry almost makes it sound like some have a P7550 and others have a P8400. Just to clarify, I'm not talking about the difference between the base model and upgraded version of the MBP (which appears to use a P8700), I am only talking about the base model.
  2. 7even macrumors 6502a

    Jan 11, 2008
    Yes, looks like they use both. However, it also appears that the two chips are identical, minus the model number.
  3. kgeier82 macrumors 65816

    Feb 18, 2008
  4. vant macrumors 65816

    Jul 1, 2009
  5. DivineEvil macrumors regular

    Feb 7, 2009
  6. kgeier82 macrumors 65816

    Feb 18, 2008
  7. guill019 macrumors newbie

    Oct 17, 2009
  8. lumpi macrumors newbie

    Aug 4, 2009
    Oh god... not another "lottery factor". :(
  9. reallynotnick macrumors 6502a

    Oct 21, 2005
    I know when I was talking to someone about undervolting their CPU ran at a lower stock voltage then mine and I could not set mine that low in coolbook (it wasn't an option) so that would make sense if there was two different processors. Sucks that I got the worse one then.
  10. fibrizo macrumors 6502


    Jan 23, 2009
    Does anyone actually have a P8400? I downloaded macCPUID from intel and I am running a P7550. I thought the P7550 was an OEM only version of the P8400? I don't know if any macs have that proc, but it's the only one you can easily find on the intel website with those specs, so maybe they just pulled that and surmised it? If anyone has a P8400 in their macbook can you let us know?
  11. gorn macrumors member

    Jun 17, 2009
    I have a P8400

    MacBook Pro 5,5 13" 2.26 GHz ordered mid-june

    $ sysctl machdep.cpu.brand_string
    machdep.cpu.brand_string: Intel(R) Core(TM)2 Duo CPU     P8400  @ 2.26GHz
  12. J&JPolangin macrumors 68030

    Jul 5, 2008
    Thule GL @ the TOW
    ...with the difference in thermal specs, which would be the better CPU?
  13. philqc macrumors newbie

    Jun 28, 2009
    From Intel:

    Thermal Specification: The thermal specification shown is the maximum case temperature at the maximum Thermal Design Power (TDP) value for that processor. It is measured at the geometric center on the topside of the processor integrated heat spreader. For processors without integrated heat spreaders such as mobile processors, the thermal specification is referred to as the junction temperature (Tj). The maximum junction temperature is defined by an activation of the processor Intel® Thermal Monitor. The Intel Thermal Monitor’s automatic mode is used to indicate that the maximum TJ has been reached.

Share This Page