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non matching memory sticks

Discussion in 'Hardware' started by tmpots, Feb 7, 2008.

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  1. tmpots

    tmpots Thread Starter

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    I added 1 gb of ram to my XPS m140 Dell laptop. After I put it in - it started up and works great. BUT - I just looked on the Dell website and it said that the memory sticks have to match. I have 1 gb and one 512 mb stick in there now - what will happen if I run it like this -- I guess I could order another 1 GB stick but will it hurt the computer to run it without matching sized memory? Help!
     
  2. walters4

    walters4

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    What 're the features of the RAM you purchased ?
    Is it PC2-3200 ?
     
  3. tmpots

    tmpots Thread Starter

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  4. walters4

    walters4

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    Also , forgot to ask you ..what're the features of your 512 mb RAM ?

    Is it similar ? and what brands ? (both the new one and old )
     
  5. tmpots

    tmpots Thread Starter

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    The old ram is Samsung 512 mb 2R x16 PC2 4200 - 444 (that's what it says on the memory stick) each stick - installed by Dell - the new is
    from Memory UP and is PC2 4200 SODIMM DDR2 533 mhz
     
  6. walters4

    walters4

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    Are you having any stability problems ?

    Also the 533 Mhz will now be read as 444 by your system ..because it usually takes the lower ram speeds..

    Don't worry about damaging your motherboard or anything like that ..because only a defective piece can do that ..yours as you mentioned works great..so no problems there..
     
  7. tmpots

    tmpots Thread Starter

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    No stability problems at all - where would I find (in my computer) that the computer is reading 444 instead of 533? Do you think I should replace the 512 mb with another 1 Gb and can I order the exact same kind of memory which I think is under my keyboard - and I am a little leary about lifting the keyboard to find the old memory. If I leave the 1 GB one in can I remove the 512 mb and not hurt the computer - then put another 1 GB in?
     
  8. walters4

    walters4

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    hmm for your first question ..check ..your ram speeds through cpu-z (a software utlity to acquire system information)..
    From what i knwo PC2-4200 is actually 533 mhz too and not 444mhz..

    I guess its a different sort of reading for notebooks..not so sure..

    and yea if your not too sure about upgrading RAM yourself because you don't want to harm your laptop ..ask your technician or a service centre..

    If there are no stability problems ..you should have no problems with the current RAM settings..hope i was helpful enough..
     
  9. tmpots

    tmpots Thread Starter

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    thank you for all of your help :)
     
  10. pshnfry

    pshnfry

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    Why you would install matching memory is to utilise dual channel memory - it doubles the memory bandwidth. (The XPS M140 supports dual channel memory according to the owners manual).
     
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