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P4s333 Mobo , DDR ram

By pazany15 ยท 4 replies
Aug 29, 2006
  1. Hi, can any 1 plz help me out.

    i've got a P4 1.8 Gh with the above Mobo, with 256 PC266 and 256 Pc2100.
    everyting was working fine.

    some time back i've been having cmos battery prob, and i had to replace the battery.

    after that, weird, My bios shows only 384 MB available even windows do so.

    i have remove the Pc266 and it shows 256 MB
    Replaced it and removed the Pc2100, and it shows 128 MB

    Even interchanged the slots, but the same.

    Cpu speed: manual
    Cpu Freq Multiple :18x
    Cpu\Pci Freq :100/33
    CPU\memory Feq :Auto

    i changed the cpu\memory freq to 1:1, restarted, bios shows 512 MB, but windows dows not load.

    getting missing config.sys or Ntfs.sys missing.

    restored it to Auto, windows starts, but getting only 384 MB.

    Even loaded bios defaults, still the same.
  2. riekmaharg2

    riekmaharg2 TS Rookie Posts: 137

    You're problem may be because you are using different memory speeds ie 256 and 266. I would suggest only using memory that are the same speed and type.
  3. MetalX

    MetalX TechSpot Chancellor Posts: 1,388

    It's not that the ram is different speeds. If ram is of different speeds, it will all run at the speed of the slowest module. Also, DDR266 and DDR PC2100 are the same speed. I think the problem may be that either some of the ram on one of the chips has been damaged so that only 128 mb of the 256 on the stick works, or that the integrated Graphics is taking up 128 mb of RAM because of shared memory so that makes it seem like you only have 384 instead of 512.
  4. pazany15

    pazany15 TS Rookie Topic Starter

    Hi, There is no Integrated Graphics on the system. i have an AGP Radeo card 64MB.

    i might consider ur saying that may be 128 MB on one chip is damaged, but when i change the Memory\frequency to 1:1 it shows 512 MB, but my windows XP doest not start, getting error missing Config.sys, Ntfs.sys...

    when i change that value to auto, it boots correctly, but with only 384 MB.

    I have been enjoying 512 Mb correctly , till my Cmos battery failed.
    After replacing the battery i am facing this problem.
  5. Tedster

    Tedster Techspot old timer..... Posts: 6,000   +15

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