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

From: Wes Newell (w.newell_at_TAKEOUTverizon.net)
Date: 07/06/05

  • Next message: Russell Shaw: "Re: AMD64-based laptops from HP/Compaq are crippled" 
    Date: Wed, 06 Jul 2005 06:09:58 GMT

    On Tue, 05 Jul 2005 13:27:03 -0700, alex goldman wrote:

    > Wes Newell wrote:
    >
    >> Overall performance
    >> increase for dual over single channel is 5% at most
    >
    > Where did you get this idea?

    >From my considerable knowledge of how they work. And then there are
    thounsands of benchmarks to prove it all over the web. find a benchmark of
    apps that have a 3400+ single channel cpu and a 3500+ dual channel listed
    in the same benchmark. Now guess which one wins most of the benchmark
    test. if you think the 3500+ you'd be wrong. Now compare the 3400+ to a
    3800+. Both have the same clockspeed of 2.4GHz, and the same 512K cache.
    Only difference is the dual channel ram. Does the 3800+ win all
    benchmarks? No. And the reason is pretty simple. The overhead of the dual
    channel slows it down when high bandwidth isn't needed. And the onboard
    very low latency memory controller allows the single channel to service
    the data request very fast compared to old chipset controller that had to
    send the data over a shared FSB. The lack of a major performance increase
    for dual channel is probably why HP decided not to use it if that's what
    they did. I still think leaving it out was stupid though. But in reality,
    it's not a big deal or advantage. Dual cores may prove to be a different
    story since they will have much more demand. Time will tell. 

    -- 
KT133 MB, CPU @2400MHz (24x100): SIS755 MB CPU @2330MHz (10x233)
Need good help? Provide all system info with question.
My server http://wesnewell.no-ip.com/cpu.php
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  • Next message: Russell Shaw: "Re: AMD64-based laptops from HP/Compaq are crippled"

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