RAM bus speed?

Discussion in 'Panasonic' started by kahlilj, Mar 14, 2019.

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  1. kahlilj

    kahlilj Notebook Enthusiast

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    I've got a CF-52 no idea if it's Mk1, 2 or ?? The SKU is CF-52CCABXBM. Anyway, I want to increase the memory size. My understanding is that it's DDR2 ram with a maximum capacity is 4GB. With 2 slots that leaves me with 2GB per card. I have two 1GB cards in there now. One of the cards has PC2-5300s which I think is the bus speed? My question is is there a maximum bus speed I can install when I replace these cards?

    I see other bus speeds available like PC2-6400, -8000... all the way up to 9200 for DDR2. Should I get the fastest possible bus speed or keep it to the 5300?
     
  2. SHEEPMAN!

    SHEEPMAN! Freelance

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  3. toughasnails

    toughasnails Toughbook Moderator Moderator

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    The 6400 will work. At one time you could get them cheaper than the 5300 but not sure now. I have used them in many of my Toughbooks but like jeff said it will only run at 5300. That is because that is all the motherboard is set to do, 5300 max.
     
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  4. kahlilj

    kahlilj Notebook Enthusiast

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    Thanks for the support docs link Sheepman! I already had entered my info in the configurator site before posting, but thanks for sharing that one too. After I posted I continued searching for posts about memory and came across this thread:
    http://forum.notebookreview.com/thr...speeds-and-compatibility.744207/#post-9551669

    So I'm not sure it will slow down. Seems it depends on the front bus speed? but regardless it doesn't seem there will be harm in going with a faster bus card. So I will see what's the best speed/cost value and purchase.

    I'm glad to have found this subforum and that it is still active! I actually joined this forum several years ago, but never got active with it. And I've had my toughbook for a few years as well, but never got around to completing my pet project with it. I already purchased a 750gb HD a few years ago with the intent to dual boot Win7 & WinXP. I want to use this primarily for diagnostics on my car. But now I also want to upgrade the RAM and wireless card. I think I have the Intel 4965AGN & intend to replace with an intel 6235 or maybe 7260. Any thoughts on those cards?
     
  5. kahlilj

    kahlilj Notebook Enthusiast

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    Thanks folks. So I have continued to look for what my FSB is. Based on the processor installed: Intel Core 2 Duo T7100 / 1.8 GHz, it appears to be a 800MHz FSB :)

    https://ark.intel.com/content/www/u...ssor-t7100-2m-cache-1-80-ghz-800-mhz-fsb.html

    If so then not only will the PC2-6400 (for 400 MHz FSB) be an upgrade over the PC2-5300 (333 MHz FSB), but I could likely go up to a PC2-8000 (533 MHz)? Does that sound reasonable?
    See this link from crucial explaining the clock rate for the different RAM:

    https://www.crucial.com/usa/en/support-memory-speeds-compatability
     
  6. toughasnails

    toughasnails Toughbook Moderator Moderator

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    Have you tried looking for DDR2 PC2-8000 laptop memory yet ? I could not find any but it's probably just me being tired :sleep:
     
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  7. BaRRmaley

    BaRRmaley Notebook Deity

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    C2D 64-bit CPU. Your max is 2x 4GB DDR2 PC2-6400 modules, recommended max is 2x2GB.
    Anyway, this 800MHz RAM will run at 667MHz on your laptop, but at lower latency (better).
    Don't forget you need SO-DIMMs, so no pc2-8000 etc :)
     
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  8. Shawn

    Shawn Crackpot Search Ninja and Options Whore

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    Last edited: Mar 15, 2019
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  9. kahlilj

    kahlilj Notebook Enthusiast

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    Yes, I have found some. but some RAM listed on sites is indicating that PC2-6400 modules are 800MHz.... now I'm all confused. lol

    Thanks Maley. where does that info come from? what is C2D?

    Thanks I've looked at some of this thread and will finish it later, but it seems to indicate the best upgrade possibly would be the 5100 card or 5300 card? I was hopeful of using the intel 6235 card.
     
  10. Shawn

    Shawn Crackpot Search Ninja and Options Whore

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    5300 rocks if you install a third antenna.
     
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