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.

    Question about the difference in dimensions between a 1640 vs 1645 vs 1647

    Discussion in 'Dell XPS and Studio XPS' started by Viper786, Sep 9, 2010.

  1. Viper786

    Viper786 Notebook Consultant

    Reputations:
    7
    Messages:
    188
    Likes Received:
    0
    Trophy Points:
    30
    As far as I can tell, the 1640, 1645 and 1647 are identical in size. Is this true?

    Would a motherboard from a 1645 fit in a 1640? or vice versa?
     
    Viper786, Sep 9, 2010
    #1
  2. loha

    loha Notebook Geek

    Reputations:
    1
    Messages:
    98
    Likes Received:
    0
    Trophy Points:
    15
    They are the same dimensions, but if you change the motherboard, then you will have to change the CPU, etc.. (C2D-1640 --> i5/i7-1647/1647)
     
    loha, Sep 9, 2010
    #2
  3. Viper786

    Viper786 Notebook Consultant

    Reputations:
    7
    Messages:
    188
    Likes Received:
    0
    Trophy Points:
    30
    Thanks, I'm not changing any parts I was just curious. So basically:

    1640 = Core 2 Duo

    1645 = i7

    1647 = i5

    Am I right? the only major difference is the processor?
     
    Viper786, Sep 9, 2010
    #3
  4. anodize

    anodize Notebook Deity

    Reputations:
    93
    Messages:
    1,478
    Likes Received:
    0
    Trophy Points:
    55
    yea. different mobo and cpu. same size.
     
    anodize, Sep 9, 2010
    #4
  5. jazzjackrabbit

    jazzjackrabbit Notebook Consultant

    Reputations:
    8
    Messages:
    122
    Likes Received:
    0
    Trophy Points:
    30
    does this mean we cant have an I7 on a XPS 1647 that came built with an I5 ?
     
    jazzjackrabbit, Sep 9, 2010
    #5
  6. loha

    loha Notebook Geek

    Reputations:
    1
    Messages:
    98
    Likes Received:
    0
    Trophy Points:
    15
    Yes that is correct.
     
    loha, Sep 9, 2010
    #6
  7. kezuk12

    kezuk12 Notebook Evangelist

    Reputations:
    33
    Messages:
    316
    Likes Received:
    0
    Trophy Points:
    30
    You can have an i7 620! ;) Quad core is overrated! :D
     
    kezuk12, Sep 9, 2010
    #7
  8. maxh

    maxh Notebook Consultant

    Reputations:
    16
    Messages:
    143
    Likes Received:
    0
    Trophy Points:
    30
    Except for the I7-620M, which is different from the other I7s; it's dual core. It does come in the 1647 and not in the 1645.

    edit: Too late! kezuk12 beat me to it...
     
    maxh, Sep 9, 2010
    #8
  9. Gloomy

    Gloomy Notebook Evangelist

    Reputations:
    33
    Messages:
    422
    Likes Received:
    0
    Trophy Points:
    30
    no it isn't :(
     
    Gloomy, Sep 9, 2010
    #9
  10. Brendanmurphy

    Brendanmurphy Your Worst Nightmare

    Reputations:
    199
    Messages:
    1,007
    Likes Received:
    0
    Trophy Points:
    55
    You cannot put a 1645/47 motherboard into a 1640. There have been slight changes in the motherboards like where screws would go and the removal of the northbridge ( could be southbridge cannot remember ) that will not allow you to change it. 1645 > 1647 or vice versa will work fine tho
     
    Brendanmurphy, Sep 9, 2010
    #10
  11. seeker_moc

    seeker_moc Notebook Virtuoso

    Reputations:
    354
    Messages:
    2,141
    Likes Received:
    21
    Trophy Points:
    56
    It's a bit of both. The memory controller that used to be in the northbridge is now integrated in the CPU, and there is no longer a FSB.

    The new 'chipset' for the i series processors is like an old southbridge (mainly a USB and SATA controller) plus the pci-e controller which used to be a part of the northbridge.
     
    seeker_moc, Sep 9, 2010
    #11
  12. Viper786

    Viper786 Notebook Consultant

    Reputations:
    7
    Messages:
    188
    Likes Received:
    0
    Trophy Points:
    30
    Ahh I see, thanks for the info. I was just curious about the differences.
     
    Viper786, Sep 9, 2010
    #12
  13. seeker_moc

    seeker_moc Notebook Virtuoso

    Reputations:
    354
    Messages:
    2,141
    Likes Received:
    21
    Trophy Points:
    56
    The hardware near-identical, I bet that if you could get someone to mod the 1647 BIOS to recognize a quad-core, it would probably work just fine.
     
    seeker_moc, Sep 9, 2010
    #13
  14. BLWNHR

    BLWNHR Notebook Enthusiast

    Reputations:
    0
    Messages:
    21
    Likes Received:
    0
    Trophy Points:
    5
    Spoken like someone who only has a dual-core, haha. :eek: :D
     
    BLWNHR, Sep 12, 2010
    #14
  15. kezuk12

    kezuk12 Notebook Evangelist

    Reputations:
    33
    Messages:
    316
    Likes Received:
    0
    Trophy Points:
    30
    Haha and I'm very proud of my mighty i7 too :D
     
    kezuk12, Sep 13, 2010
    #15
  16. yuley

    yuley Notebook Consultant

    Reputations:
    2
    Messages:
    134
    Likes Received:
    0
    Trophy Points:
    30
    I am going to grab Kezik12's laptop once I figure out where in the world he lives. I am guessing the stated location of England UK is a lie so I am going to start in Fiji. Or maybe I should do this alphabetically and start in Afghanistan or something.

    ;)

    I'll be really angry however if he is using the anti-theft feature ...

    I am a big fan of the i7-620M but its no longer a configurable option ... And Dell lured me in with a very cheap price to buy the quad core.
     
    yuley, Sep 13, 2010
    #16
  17. anodize

    anodize Notebook Deity

    Reputations:
    93
    Messages:
    1,478
    Likes Received:
    0
    Trophy Points:
    55
    720qm vs 620m, I'd hesitate too, but 740qm vs 620m? I'd choose the quad in a heartbeat. I wish the xps16 supported multi cpus like the alienware m17x. :(
     
    anodize, Sep 13, 2010
    #17
  18. Brendanmurphy

    Brendanmurphy Your Worst Nightmare

    Reputations:
    199
    Messages:
    1,007
    Likes Received:
    0
    Trophy Points:
    55
    Imo my config is the best. I would never take a dual core over it. Im contemplating whether or not an 840qm or an SSD is next in my upgrades list. :)
     
    Brendanmurphy, Sep 13, 2010
    #18