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Thread: Will this CPU fit on my mobo?




  1. #1
    Join Date
    Feb 2002
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    I have a Intel SE440BX-2 mobo. It supports CPU's upp to P3 850Mhz@100Mhz. But I wonder if I can buy a P3 866Mhz CPU and install it?
    Is there any option to "downclock" it or something?
    If I can get it to fit then I'll have a 2nd gameable computer :D

    http://www.intel.com/support/motherb...bx2/compat.htm

    There's some info for my mobo.

    I hope that it will work, I mean, why should it not?
    The CPU is SLOT1 and the mobo is also SLOT1 (duuuh) :)

    Thanx in adavance.
    --- --- --- --- ---
    "Limits where made to be broken"
    "The only true love is the love to yourself"

    P2 266MMX
    36GB HD
    256Mb RAM
    GeForce Annihilator PRO 32Mb 256 DDR
    Memorex 12x,10x,32x
    19" monitor

  2. #2
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    Not at the 133MHz bus speed in all likelyhood. It'll probably run, just not at the 866MHz. More like 650 or something. The Intel BX board's don't have a real 133MHz setting, and few if any FSB options.

    I'd say 99.9999999999999999999999999999999999999999% big, fat, hairy "NO"

  3. #3
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    Yeah bein' an Intel board would probably not have the FSB settin' for 133MHz and even if it did floppy and IDE controllers plus various add on cards probably wouldn't like the overclocked bus rates. :smokin:
    <center>:cheers:</center>

  4. #4
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    Ok. But why? I mean, it's just 16Mhz difference. And the bus speed will decrease from 133 to 100Mhz. Won't it? But if the bus speed already is at 100Mhz, maybe it's a bigger chance for it to work?
    --- --- --- --- ---
    "Limits where made to be broken"
    "The only true love is the love to yourself"

    P2 266MMX
    36GB HD
    256Mb RAM
    GeForce Annihilator PRO 32Mb 256 DDR
    Memorex 12x,10x,32x
    19" monitor

  5. #5
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    Feb 2002
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    Quote Originally Posted by Wiggo
    Yeah bein' an Intel board would probably not have the FSB settin' for 133MHz and even if it did floppy and IDE controllers plus various add on cards probably wouldn't like the overclocked bus rates.
    <center>:cheers:</center>
    But if the 866Mhz CPU is at 100Mhz then? I installed my P2 266Mhz MMX CPU on a celeron/P3 compatible mobo. It did run, but only at 133Mhz (Dunno about the bus speed thou). And since it was a Dell computer I could not attempt to "tweak" it to it's original speed.
    Not so fun if this 866Mhz CPU only runs at 133Mhz... heh.
    Maybe I should mail Intel and ask, but they will probably never answer me :(
    --- --- --- --- ---
    "Limits where made to be broken"
    "The only true love is the love to yourself"

    P2 266MMX
    36GB HD
    256Mb RAM
    GeForce Annihilator PRO 32Mb 256 DDR
    Memorex 12x,10x,32x
    19" monitor

  6. #6
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    There is no 100MHz FSB 866 P3. It's a 6.5 multiplier and a 133MHz bus. Do the math with either bus: one is 650MHz the other 866. The 850 runs a 100MHz bus, hence 8.5x100=850

    If the CPU is an EB or ends with the numbers 33 or 66, it's a 133MHz FSB chip. You can run it at 100MHz, but it won't run at full speed.

    Chart below to illustrate.

    5.5,6.0,6.5,7.0,7.5,8.0,8.5 x 100=550,600,650,700,750,800,850

    5.0,5.5,6.0,6.5,7.0,7.5 x 133=667,733,800,866,933,1GHz

  7. #7
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    And why pay for a CPU that your just goin' to underclock? Intel CPU's are fully multiplier locked so ya can't change that. :smokin:
    <center>:cheers:</center>

  8. #8
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    Yikes! :D
    That was a hell of an answer Morgan :D Thanx.
    Ok, I guess I have to buy a new cheap mobo for it then.
    Maybe he'll throw away the CPU and the mobo for $90 or something.

    Thanx dudes! :)
    --- --- --- --- ---
    "Limits where made to be broken"
    "The only true love is the love to yourself"

    P2 266MMX
    36GB HD
    256Mb RAM
    GeForce Annihilator PRO 32Mb 256 DDR
    Memorex 12x,10x,32x
    19" monitor

  9. #9
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    Dec 2001
    Posts
    1,297

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    Some places will cut you a deal on a mobo/CPU combo, not all, but it's not uncommon. Also, if possible, I advise taking local shops into account.

  10. #10
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    I love my local stores, they provide answers and warranties that keep me coming back. Pricewatch is only a last stop effort.

    -might be different with you

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