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Thread: Mobile Prescott multipliers fully UNLOCKED and changeable on desktop motherboard :D

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    Mobile Prescott multipliers fully UNLOCKED and changeable on desktop motherboard :D

    I'd been wondering if the newer Prescott Mobile CPUs could have their multilier changed in Windows as according to the spec sheets the Mobile P4 1M Prescott 533FSB CPUs should have the ability to change the multiplier using software regardless of chipset, ....

    P70 of the 30242403.pdf:

    6.3 Enhanced Intel SpeedStep® Technology

    The processor will feature Enhanced Intel SpeedStep technology. Unlike previous implementations of Intel SpeedStep technology, this technology will enable the processor to switch between multiple voltage and operating frequency points instead of two. This will enable superior performance with optimal power savings. Switching between states will be software controlled unlike previous generation processor implementations where the GHI# pin was used to toggle between two states. Following are the key features of Enhanced Intel SpeedStep technology:

    • Multiple voltage/frequency operating points provide optimal performance at the lowest power.
    • Voltage/Frequency selection will be software controlled by writing to processor MSRs (Model Specific Registers) thus eliminating chipset dependency.

    blah blah blah,....

    Well I tried it today and Yep it works!

    Abit IC7 i875 mobo / Mobile Prescott 3.06 533FSB CPU SL7DT / RightMark Clock utility: Multipliers all unlocked from 14x to 23x

    Last picture I changed the voltage in BIOS to 1.4v instead of default 1.15V to see if the volts would stay or be lost with the clock utility software, the volts stayed allowing volts beyond the 1.35v max in the utility









    I likes this Enhanced Speedstep ALOT! (earlier Speedstep just plain sucked)

    This is in my main work PC so I can't chance fuxxing up my hard disks by pushing hard just yet, I'll try it with another disk on later, but 3.6Ghz was totally rock stable @ 1.25v, the excessive volts @ 3.8Ghz was just checking the volts changed as required.

    Cheers,

    MM
    Last edited by Mr Meltdown; 23-05-2005 at 01:27 PM.

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    DR
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    Cool

  3. #3
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    • BenW's system
      • Motherboard:
      • ASRock Dual SATA2
      • CPU:
      • AMD64 3500+
      • Memory:
      • 1GB Crucial DDR
      • Storage:
      • 160GB Samsung 8MB Cache
      • Graphics card(s):
      • Sapphire Radeon HD 3850
      • PSU:
      • Seasonic S12 600W
      • Case:
      • Silverstone TJ-04
      • Monitor(s):
      • Dell 17" Ultrasharp
      • Internet:
      • Virgin 8Mb
    My P4s multiplier unlocked aswell but its an old 2.26 533 northwood

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    Amended.

    Your 2.26Ghz is an unlocked ES then.

    CHeers,

    MM

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