The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
Problems? See this thread at archive.org.

    Problem with CPU-Z !

    Discussion in 'Dell XPS and Studio XPS' started by PJ@y-Z, Jul 11, 2008.

  1. PJ@y-Z

    PJ@y-Z Notebook Evangelist

    Reputations:
    41
    Messages:
    484
    Likes Received:
    0
    Trophy Points:
    30
    CPU-Z doesn't show the CPU frequency correctly !
    It has problem with Bus Speed !
     

    Attached Files:

    • CPUZ.jpg
      CPUZ.jpg
      File size:
      246.5 KB
      Views:
      146
    PJ@y-Z, Jul 11, 2008
    #1
  2. sefk

    sefk Notebook Consultant

    Reputations:
    99
    Messages:
    278
    Likes Received:
    0
    Trophy Points:
    30
    Normal, your CPU reduce its speed(underclock) at idle to reduce heat and consumption.
     
    sefk, Jul 11, 2008
    #2
  3. Chucklz_smiley

    Chucklz_smiley Notebook Consultant

    Reputations:
    11
    Messages:
    187
    Likes Received:
    0
    Trophy Points:
    30
    Its called intel speed step technology and it underclocks the cpu when its not under load to conserve battery life, if u run something like a music converter then ull see it go bk up
     
    Chucklz_smiley, Jul 11, 2008
    #3
  4. PJ@y-Z

    PJ@y-Z Notebook Evangelist

    Reputations:
    41
    Messages:
    484
    Likes Received:
    0
    Trophy Points:
    30
    No, CPU-Z says 1.6GHz (8x200) but Everest and Vista say it's 800MHz (8x100)
    Which one is correct ?
     
    PJ@y-Z, Jul 12, 2008
    #4
  5. flipfire

    flipfire Moderately Boss

    Reputations:
    6,156
    Messages:
    11,214
    Likes Received:
    68
    Trophy Points:
    466
    SpeedStep allows the clock speed of a processor to be dynamically changed by software. Running the processor at higher clock speeds allows for better performance. However, when the processor is run at a lower speed, its core voltage can be reduced, allowing for reduced power consumption and heat dissipation
     
    flipfire, Jul 12, 2008
    #5
  6. jwtarbaj

    jwtarbaj Notebook Enthusiast

    Reputations:
    0
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    5
    SpeedStep reduces the multiplier to reduce your CPU clock speed. It cannot change the FSB speed which is a fixed speed. Currently the lowest your cpu should go is 1.2GHz as the lowest multiplier is 6.0x 200MHz = 1.2GHz

    I'm pretty sure the min speed your CPU will run is in the BIOS.
     
    jwtarbaj, Jul 12, 2008
    #6
  7. miner

    miner Notebook Nobel Laureate

    Reputations:
    1,326
    Messages:
    7,137
    Likes Received:
    0
    Trophy Points:
    205
    Its just dynamic FSB switching which reduces your FSB in half. CPU-Z doesnt show SLFM mode properly.
     
    miner, Jul 12, 2008
    #7
  8. PJ@y-Z

    PJ@y-Z Notebook Evangelist

    Reputations:
    41
    Messages:
    484
    Likes Received:
    0
    Trophy Points:
    30
    Can you explain more about SLFM mode ? :confused:
     
    PJ@y-Z, Jul 13, 2008
    #8
  9. flipfire

    flipfire Moderately Boss

    Reputations:
    6,156
    Messages:
    11,214
    Likes Received:
    68
    Trophy Points:
    466
    Super Low Frequency Mode.

    It lets your CPU's idle frequency and voltage go even lower (600 or 800mhz) instead of 1.2ghz idle.

    More power savings.
     
    flipfire, Jul 13, 2008
    #9
  10. 7oby

    7oby Notebook Evangelist

    Reputations:
    151
    Messages:
    457
    Likes Received:
    0
    Trophy Points:
    30
    To be more precisely:

    . SuperLFM reduces the FSB800 (200MHz) -> FSB400 (100MHz)
    . This allows for frequencies such as 800MHz with 8x Multiplier
    . CPU-Z is not aware of SuperLFM, Everest is
     
    7oby, Jul 14, 2008
    #10
  11. PJ@y-Z

    PJ@y-Z Notebook Evangelist

    Reputations:
    41
    Messages:
    484
    Likes Received:
    0
    Trophy Points:
    30
    Why not 600MHz (6x100) ?
     
    PJ@y-Z, Jul 15, 2008
    #11
  12. flipfire

    flipfire Moderately Boss

    Reputations:
    6,156
    Messages:
    11,214
    Likes Received:
    68
    Trophy Points:
    466
    You will need to use RMclock to switch the SLFM multiplier to 6x
     
    flipfire, Jul 15, 2008
    #12
  13. PJ@y-Z

    PJ@y-Z Notebook Evangelist

    Reputations:
    41
    Messages:
    484
    Likes Received:
    0
    Trophy Points:
    30
    Thanks very much !
     
    PJ@y-Z, Jul 15, 2008
    #13