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    CPU Upgrade - Pentium M from Inspiron 6000 -> Aopen 1557 - Help!

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by oan001, Jan 4, 2011.

  1. oan001

    oan001 Notebook Evangelist

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    Hi,

    I pulled a 2.00 ghz pentium M processor from an old inspiron 6000 and I am trying to put it into my old Aopen 1557.

    The cpu fits in the Eopen and the BIOS detects it as a 2.00 ghz processor running at 1500 Mhz (don't know why this is so :confused: ).

    However, when the bios screen disappears the computer shuts itself down.

    Here is a picture of the two CPUs, the "new" one is on the right:
    [​IMG]

    Here are details on the Aopen 1557:
    AOpen Global

    If anyone can tell me why this isn't working I would greatly appreciate it!
     
    oan001, Jan 4, 2011
    #1
  2. aylafan

    aylafan TimelineX Elite

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    Your BIOS on the AOpen 1557 laptop needs to be able to support the Pentium M 2GHz processor you put in it (updated BIOS, etc.). Not all processors that use the same socket; meet the same requirements. That is probably why the laptop doesn't boot up after the BIOS screen.

    The FSB (Front Side Bus) is probably running lower than it's supposed to (400 versus 533).

    FSB 400 (100 x 4) with a multiplier of 15. 15 x 100 = 1500
    FSB 533 (133 x 4) with a multiplier of 15. 15 x 133 = 1995

    If your motherboard only supports FSB 400 max then your Pentium M (FSB 533) will run at FSB 400; causing the processor to run at 1500MHz instead of 2GHz.
     
    aylafan, Jan 4, 2011
    #2
  3. maximinimaus

    maximinimaus Notebook Evangelist

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    The 2.0 GHz runs at a FSB of 533 MHz. Looking at Aopen website shows you can max put in a 2.0 GHz processor with a FSB of 400 MHz.
     
    maximinimaus, Jan 4, 2011
    #3
  4. Nick

    Nick Professor Carnista

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    There are 2 different types of Pentium M processors. Ones that run at 400mhz bus and 533mhz bus. So there are 2 different Pentium M processors that run at 2GHz, one with a 400MHz bus and the other with a 533MHz bus.

    Here's the Pentium M 755 2GHz, 400MHz bus CPU: Intel Pentium M Centrino 2Ghz 2M L2 755 SL7EM - eBay (item 270688130145 end time Feb-03-11 16:33:22 PST)

    This is the Pentium M 760 2GHz, 533MHz bus CPU you have: Intel Pentium M Centrino 760 2GHZ 533MHz 2M SL7SM - eBay (item 180608167040 end time Jan-08-11 13:45:40 PST)
     
    Nick, Jan 4, 2011
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  5. oan001

    oan001 Notebook Evangelist

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    Thank you all for your replies. I guess I won't be upgrading the CPU after all. I think I'll just buy some new ram stick (2 x 1 gb) as it makes more sense for my needs.
     
    oan001, Jan 5, 2011
    #5
  6. michael_recycled

    michael_recycled Notebook Deity

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    You'd better check if your laptop's chipset supports 2x1 GB RAM. Not all do that.

    Michael
     
    michael_recycled, Jan 5, 2011
    #6