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Pc100 / Pc133 Memory Conflict ??

Discussion in 'Hardware' started by nsimister, Jul 19, 2005.

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  1. nsimister

    nsimister Thread Starter

    Joined:
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    Hi

    I have used Belarc to check my motherboard, processor etc.
    It said my FSB was 133 Mhz
    It also said my Dimm currently fitted was 100Mhz Sdramm (2 x 128)

    So..i think mistakingly i thought it would be ok to buy a 256md sdram PC133....however, the system only sees it as 123 giving me a total of approx 383.

    IS this obviois or is there a setting i should alter OR have i bought the wrong type and need PC100

    Any help much appreciated (y)

    Cheers
     
  2. brite750

    brite750

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    whats your mobo? some are picky about mixxing ram types especially older ones
     
  3. ~Candy~

    ~Candy~ Retired Administrator

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    Many times, the newer 133 isn't backwards compatible. There was a time when it was pretty much ok, but they changed somewhere along the line. I think even Crucial put a notice on their website.
     
  4. Arcadion

    Arcadion

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    The problem most likely is that the 256MB stick you bought is high-density, you can tell it's high-density if it has 4 or 8 chips on it. You need low-density SDRAM, which for a 256MB stick would have 16 chips (8 on each side). This is more likely to be a problem with the Intel LX/EX/BX/ZX chipsets than VIA P3 ones.
     
  5. nsimister

    nsimister Thread Starter

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    Thanks Guys
    My motherboard is an Aopen Ax6BC
    Intel pentium 3 733Meg

    From "Everest" my hardware details:

    RFrontside Bus Properties
    Real Clock 133
    Effective Clock 133

    It sounds like i need to buy PC100 and try and flog this 133 back on Ebay!! :(


    Cheers
     
  6. Arcadion

    Arcadion

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    Yeah, that board uses a BX chipset, if you bought that RAM new you should be able to return it and get a low-density stick instead. At least you could if you bought it from a reputable place.
     
  7. nsimister

    nsimister Thread Starter

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    I bought it from a normal ebay user, not a shop, so i'm a bit stuffed i think :(

    Ah well you live and learn :)

    Thanks for everyones comments and suggestions

    Neil
     
  8. ~Candy~

    ~Candy~ Retired Administrator

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    The good news is that it shouldn't have cost much and you can probably find someone who can use it :)
     
  9. Perfesser

    Perfesser

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    Jun 1, 2003
    Messages:
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    NOT an ad, just a plug for OEMPCWorld...if you buy from them they will buy your old memory for about 1/2 of what they are selling the same for, and they have a lifetime warranty. I bought a pair of 256mB low density (same kind you need) and got a replacement for one after over a year - and got a Crucial 256m for a replacement.
    It took about a week - not bad for mail order!
    A lot of older PC100 will work at 133.
    www.oempcworld.com
     
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