Re: AMD64-based laptops from HP/Compaq are crippled

From: Doug Lynn (dblynn_at_gmail.com)
Date: 08/14/05

  • Next message: robertharvey_at_my-deja.com: "Re: Linux PDA recommendation needed" 
    Date: Sat, 13 Aug 2005 18:31:02 -0400

    Hi, aren't Turions all socket 754...???

    Thats what I read...

    "Robert Klute" <news@klute.us> wrote in message
    news:igckc1d7gif94bumgdv80dchjj5fuqn6hu@4ax.com...
    > On Tue, 05 Jul 2005 06:55:04 GMT, Robert Klute <news@klute.us> wrote:
    >
    >>On Mon, 04 Jul 2005 23:19:07 -0700, alex goldman <hello@spamm.er> wrote:
    >>
    >>>Robert Klute wrote:
    >>>
    >>>> On Mon, 04 Jul 2005 20:46:58 -0700, alex goldman <hello@spamm.er>
    >>>> wrote:
    >>>>
    >>>>>I've been researching my next laptop purchase, and whether it will run
    >>>>>Linux, and completely accidentally stumbled upon an alarming issue that
    >>>>>people need to be more aware about.
    >>>>>
    >>>>>Apparently (and if my understanding is correct), HP/Compaq disables
    >>>>>dual-channel memory access in Socket 939 motherboards, making CPU <->
    >>>>>RAM
    >>>>>communication slower, and overall performance less than what people
    >>>>>would
    >>>>>expect when buying a system with the outward characteristics of what
    >>>>>they
    >>>>>think they are getting.
    >>>>>
    >>>>>http://zv6000forums.com/viewtopic.php?t=148
    >>>>
    >>>> The laptops use the Turion chip.
    >>>
    >>>Wrong. _Some_ of the laptops use the Turion chip (quite few as of this
    >>>writing, actually).
    >>
    >>The zv6000, the laptop under discussion here and in the forum you
    >>referenced, uses the Turion chip.
    >>
    >>>Regardless ...
    >>>
    >>>> According to AMD, the Turion's
    >>>> integrated memory controller can use PC1600, PC2100, PC2700 or PC3200
    >>>> unbuffered DDR SO-DIMMs and has a maximum throughput of 3.2 GB/s.
    >>>
    >>>Do you understand how dual-channel access works? You have 3.2 GB/s per
    >>>memory module, i.e. up to 6.4 GB/s. Dual-channel access is more, not
    >>>less,
    >>>important when slow memory is used.
    >>
    >>NO, the Turion's memory controller is 64-bit and limited to a max of
    >>3.2GB/s. Dual channel won't help. Read the specs. Here is the
    >>executive's graphic for you:
    >>http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_12651_12663,00.html
    >
    > And just to be absolutely clear, only the chips with 128-bit memory
    > controllers can use dual channel memory and ALL the mobile AMD-64 chips
    > are listed as being socket 754 and having 64bit memory controllers.
    >
    >
    > http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_10220_10221^11030,00.html
    >
    >
    > As for the forum thread you referenced, the posters are just a bunch of
    > whiny idiots. Since only an idiot would think that a laptop would use
    > an 89W 939 chip in it. Talk about a hot system, it would have to come
    > with a nomex pad to keep you from getting 2nd degree burns.

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