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Thread: RAM

  1. #1
    3 Star Lounger
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    RAM

    Could someone please tell me what they would recommend and what the real difference is between RDRAM and DDR SDRAM? Thank you! We are looking at purchasing new systems. <img src=/S/headthrob.gif border=0 alt=headthrob width=15 height=15>
    lynndelap

  2. #2
    Uranium Lounger
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    Re: RAM

    RDRAM only works on Intel Pentium IV platforms. It runs at higher clock speeds, and has a higher bandwidth for passing data. It is also expensive compared to DDR SDRAM. RDRAM also requires that all slots on the mainboard be filled to work. The design of Rambus allows it to reach high memory speeds (more data is processed simultaneously). Oh, yeah, and it gets hot, too.

    DDR memory uses both the uptick and down tick of the clock to transfer data, whereas SDR SDRAM only uses one tick out of two (the rising edge of the system clock). This gives it a speed twice that of the main system bus (commonly 133MHz). DDR systems have a large AMD base but Intel support for the Pentium IV with DDR SDRAM is changing that. Pentium IV motherboards with cheaper memory....smart marketing move.

    It's a brand people know. Now it costs less to own that brand. It leaves you with a choice of brand loyalty (AMD or Intel) and cost. I think most people will stay away from pricier RDRAM in favor of cost and flexibility.

    There is an excellent look at the difference between these types of memory at Crucial's website.
    -Mark

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