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Video card buses?

Discussion in 'NVIDIA' started by binsky3333, Feb 25, 2008.

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  1. binsky3333

    binsky3333 New Member

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    I was just wondering about Video card buses. Is the bigger the bus the better. For example is a 320bit bus better than a 256bit bus?
     
  2. largon

    largon

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    Not necessarily.
    Bandwidth is what matters in the end.

    bandwidth = bus width × memory frequency data rate

    For example:
    320bit × DDR-1600 = 62.5GB/s
    256bit × DDR-2000 = 62.5GB/s
    In this case 320bit and 256bit are equal.
     
  3. candle_86 New Member

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    someone besides me understands
     
  4. wolf

    wolf Performance Enthusiast

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    i understand too :p i find myself constantly explaining the computations for pixel and texture fillrate, memory bandwidth, and peak shader arithmetic.

    knowing the math behind the cards really helps when your choosing what to buy.
     
  5. candle_86 New Member

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    agreed, last time i explained that stuff i was called a liar.
     
  6. wolf

    wolf Performance Enthusiast

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    as long as you know your are right and whoever calls you a lair is wrong then it doesn't matter, let them be ignorant if they so desire.

    we can only try to help people when asked, if at that point they think were lying then screw em.
     
  7. DanTheBanjoman Señor Moderator

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    Yet the 256Bit bus will have a lower latency. So probably has a slightly higher effective bandwidth. Your example is theoretical.
     
  8. W1zzard

    W1zzard Administrator Staff Member

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