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    Studio 1737 CPU Speed Question

    Discussion in 'Dell' started by Bazooka, Apr 17, 2009.

  1. Bazooka

    Bazooka Newbie

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    I recently purchased a refurbished Studio 1737 from Dell. The CPU is the T9400 2.53GHZ with 6MHz cache and is listed at 1066MHz FSB. I ran several system checking software suites which showed errors in the hardware configuration because the motherboard is only capable of supporting a FSB of 800MHz.
    Does anyone have a similar issue or can provide an explanation about this? I know the memory is 800MHz but I expected this deluxe CPU to be supported by the motherboard and run at 1066MHZ.
    Thanks for any replies.
     
    Bazooka, Apr 17, 2009
    #1
  2. allfiredup

    allfiredup Notebook Virtuoso

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    The GM45/PM45 chipset can support DDR2-800 or DDR3-1066 RAM (one or the other, not both). Because Dell uses DDR2-800 in the 1537, the chipset is essentially "downclocked'" to 800MHz. THe chipset/memory are effectively slowing the processor's FSB down to 800MHz. The 2.5GHz T9300 (800MHz FSB, 6mb L2 cache, Penryn) would likely return identical performance to your T9400!
     
    allfiredup, Apr 17, 2009
    #2
  3. Commander Wolf

    Commander Wolf can i haz broadwell?

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    Wait wait, unless I'm misinterpreting what you're saying, that's false. 800MHz memory doesn't imply 800MHz FSB; I'm sure most people run their 45-Series machines at 1066MHz FSB and 800MHz memory. There's a memory divider.

    That being said, there's way your chipset only supports up to 800MHz FSB processors. That would imply that it's a 965-Series board (and the Studio 17 did have a motherboard revision) which would not support a T9400. So if you've really got a T9400, you'll have to have a 45-Series chipset and your chipset will have to support a 1066MHz FSB.

    Ultimately I think your reading programs are wrong. What're you using?
     
    Commander Wolf, Apr 17, 2009
    #3
  4. Mastershroom

    Mastershroom wat

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    That's not true at all. I have a Studio 1535 with the PM965 chipset. I'm running a T9500 right now, which has an 800MHz FSB, but my RAM is only 667MHz. Nothing's being underclocked, though.

    Bazooka, if you have a 1737, then you have the newer PM/GM45 chipset, and support for 1066MHz FSB processors. It will not underclock. Only the 1735 (older PM/GM965 chipset) is limited to 800MHz FSB. That's the difference between Studio laptops with the 1535/1735 and 1537/1737 series: the '35 series uses the Santa Rosa platform with the PM or GM965 chipset (P or G depending on whether you have discrete or integrated graphics) wihch means max FSB of 800MHz and max DDR2 memory of 667MHz, and the '37 series uses the newer Montevina platform, with the PM or GM45 chipset, with max FSB of 1066MHz and max DDR2 memory frequency of 800MHz.
     
    Mastershroom, Apr 17, 2009
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    rodnsue likes this.