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Is it TRUE? DDR ram is twice as good as SDRAM?

Discussion in 'Hardware' started by deanr, Jan 27, 2005.

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  1. deanr

    deanr Thread Starter

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    Hi Folks !!!!! Jus like the header says- is it true ? I`ve got 768 SDRAm + considering getn 500 ddr ram. Is DDR RAM double the speed of sdram ???? Its only $99 i know for 500 DDR RAm but like to know if its twice as fast as SDRAM ? Thanx people ! Later Dean :)
     
  2. Paladin-X

    Paladin-X

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    In short, yes it is faster. However, the question is does your motherboard have DDR RAM slots? DDR RAM requires a different slot than SDRAM.
     
  3. JohnWill

    JohnWill Retired Moderator

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    And dual DDR is twice as fast as running it as a single module. Speed kills! :D:D:D
     
  4. CarlssonMB

    CarlssonMB

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    I would guess that if you have SDRAM now, your motherboard doesn't support DDR
     
  5. ~Candy~

    ~Candy~ Retired Administrator

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    Depends, one of my boards will take either. Obviously, not both at the same time.
     
  6. Triple6

    Triple6 Moderator

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    And while its twice as fast on paper and ups the bandwidth to several times that of SDRAM it won't make the computer run twice as fast even if your motherboard would support DDR.
     
  7. Arcadion

    Arcadion

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    In memory benchmarks (e.g. memtest86) DDR SDRAM performs roughly 50% faster than regular SDRAM, although this translates to a smaller (e.g. 10%) gain in general-purpose applications. But your board has to have 184pin DDR SDRAM slots to be able to take it, regular SDRAM fits in 168pin slots. Some boards have both, most don't. I don't think it's worth getting a new board just to use DDR SDRAM.
     
  8. JohnWill

    JohnWill Retired Moderator

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    When you factor in the cache hit rate of 90% or better on any modern processor, there isn't a huge amount of performance to gain with better memory bandwidth. It's just one of many performance boosts that you can combine, it's called a new hotrod system. :D
     
  9. Arcadion

    Arcadion

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    The cache hit rate depends on the application you're running, natch.
     
  10. chords

    chords

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    So am I better running 2 X 512 DDR400 than 1 X 1024 DDR400 and if so why?. Thanx
     
  11. JohnWill

    JohnWill Retired Moderator

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    If you're running on a dual channel board, the two RAM modules will give you greater memory bandwidth. The reason is simple, they're simultaneously accessed, so you are fetching twice the data in the same amount of time.
     
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