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Thread: Underclocking an Athlon XP on KT133 chipset?




  1. #1
    Join Date
    Sep 2002
    Posts
    40

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    Well this may make no sense to any of you since motherboards are so cheap now, but is it possible to underclock a Palomino or Thoroughbred processor to a measly 14x100MHz? My buddy has an old system that runs great all except for the fact that it is a Duron 800MHz. His system specs are:

    ASUS A7V (KT133 Chipset) limiting OC to 116-120MHz FSb
    Duron 800MHz
    512MB PC-100 SDRAM
    ADAPTEC u160 SCSI Controller
    RADEON 9000
    Generic 10/100 NIC
    120GB WD HDD
    20GB Segate HDD
    8GB Maxtor HDD
    IBM&SEGATE u160 HDD.

    I know I can easily find a Thunderbird core 100MHz part but just don't really want to deal with the heat.
    It's NEVER fast Enough!!!
    __________________________
    SYSTEM 1

    Cel-T 1.3@1.575
    ABIT ST6
    512MB PC-133 SDRAM
    GF3 Ti200 64MB
    SB PCI 128
    Adaptec 2100s u160
    15K Hitachi 18.6GB HDD
    _________________________
    SYSTEM 2

    AthlonXP 2000+@1760MHz
    MSI KT3 Ultra2-CE
    256MB PC-2700 CAS-2.5
    RADEON 9000 PRO
    MAXTOR 20GB ATA-133
    SB Live! 5.1
    3COM 3905C-TXNM
    _________________________

  2. #2
    Join Date
    Nov 2001
    Location
    Texas, USA
    Posts
    4,825

    Default

    I don't think that it will work. Not because of the heat or anything, but that the motherboard's chipset won't be able to handle the newer processors.

    As a matter of fact, I recall that the lowest chipset capable of handling the Palomino processor was rev 1.2 of the KT133A, so your current board won't cut the load at all.

    Also of concern is the fact that I don't think the old KT133 chipset would be able to handle the lower voltage settings required by the new breed of processor. You can double check for yourself in the BIOS, but you'd likely fry your new processor the moment you tried to fire it up... literally.
    Old age and treachery will overcome youth and skill
    My Toys

  3. #3
    Join Date
    Nov 2001
    Location
    New England Highlands, Australia
    Posts
    21,907

    Default

    Really though just changin' ya mobo and memory (nForce2 or KT333/400 and DDR) will even give that old Duron a new lease of life. but there are still 1100MHz 200DDR FSB Athlons to be had in the US like this one, http://www.directron.com/thunderbird11.html ;)
    <center>:cheers:</center>

  4. #4
    Join Date
    Sep 2002
    Posts
    40

    Default

    Well my friend is really set on building a PIV system...why I'm not sure, but oh well. I guess the whole marketing thing about true MHz (GHz in this day and age) still lays dormant in his head somewhere. I just wanted him to get a taste of what an AMD system now is like versus the one he already has. Plus the guy just put in some new brakes and rubbers for his car so money is kind of a factor now.

    That's why I suggested the processor upgrade, the A7V does support voltage down to the needed for the Palomino core and Thoroughbred cores, but I'm not sure the bios will. Oh well maybe it is just time for a new MB and Memory.

    I told him that he should just get a KT333 based board, since they are pretty cheap now, and a Throughbred 1700+ or 1800+ and bring the FSB to 166MHz. Which should hold him over to the Barton Core or better yet the up and coming 64bit processors.

    BTW, how are the NFORCE-2 boards on the market now or the KT400 ones?
    It's NEVER fast Enough!!!
    __________________________
    SYSTEM 1

    Cel-T 1.3@1.575
    ABIT ST6
    512MB PC-133 SDRAM
    GF3 Ti200 64MB
    SB PCI 128
    Adaptec 2100s u160
    15K Hitachi 18.6GB HDD
    _________________________
    SYSTEM 2

    AthlonXP 2000+@1760MHz
    MSI KT3 Ultra2-CE
    256MB PC-2700 CAS-2.5
    RADEON 9000 PRO
    MAXTOR 20GB ATA-133
    SB Live! 5.1
    3COM 3905C-TXNM
    _________________________

  5. #5
    Join Date
    Nov 2001
    Location
    New England Highlands, Australia
    Posts
    21,907

    Default

    Why change the CPU right away as that Duron should be able to run at 1GHz w/ a FSB of 133MHz so long as ya got good coolin'? :?:

    That way ya can hold out till Barton is well released to upgrade the CPU and you can get some "darkside" experience in on that Duron as most were very talented that I tried (most 800's went between 980MHz and 1080MHz but most in the 1010-1060MHz range). :devil win
    <center>:cheers:</center>

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