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    Bottleneck beteween CPU and RAM?

    Discussion in 'Lenovo' started by AceOfSpades, Jul 30, 2007.

  1. AceOfSpades

    AceOfSpades Notebook Consultant

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    I noticed that the T7300 is 800 MHz while the RAM clocks in at only 667 MHz, now doesn't this mean that the RAM will effectively be a bottleneck since it only runs at 667 MHz?
     
  2. Saneless

    Saneless Notebook Evangelist

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    No, your CPU already runs at a much faster speed than the bus and is already bottlenecked by the whole system :)

    The difference is really not that big. I guess there's a "bottleneck" but it'd be like trying to pour water into a funnel with a 5 inch opening vs a 5 1/2 inch opening. Measurable difference? Sure. Will you notice? No.
     
  3. Tailic

    Tailic Notebook Deity

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    I'd be more worried about your HDD as a bottleneck.

    The actual fsb isn't 800mhz, its really pumped up there from a lower speed. I think its 266 but I'm not sure for notebooks.

    Heres memory tests for the desktop Core 2 Duos, just check out the last two pages. Remember those have a fsb pumped up to 1066, faster then the 800mhz Core 2s out right now and they only notice a small improvement going up from 667 and 800mhz in the gaming tests.
     
  4. Snap

    Snap Notebook Consultant

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    I totally agree!! HDD is the bottleneck by far, but there is a solution called a Solid State Drive:
    [​IMG]

    However, not all SSDs are created equal. Mtron's SSD is the fastest in the world, not only in sustained read/write speed but in sequential & random access speed. A HDD must physically locate data on a platter and position the actuator arm over the correct position before data can be read which translates to seek time. A SSD doesn't have any seek time, it's limited to it's IOPS & read/write speed, which is why you will notice a phenomenal speed increase in application load, file copy, boot time, shut down time, & sleep/hibernation states. Instead of upgrading from 5400 rpm to 15,000 rpm HDD and only shaving off seconds, you go from waiting to seemingly instantaneous with SSD.
    [​IMG]

    Of course the performance boost isn't the only compelling reason to replace a mechanical drive, other incentives:
    1. No moving parts: no vibration & no noise (totally silent)
    2. Consumes 50% less power: less heat & longer battery life.
    3. Lighter weight, translates to lighter laptop.
    4. 1000 - 1500g operating shock.
    5. Reliability & Endurance that a mechanical HDD can't provide (50% of computer failure is due to HDD failure!):
      -Write Endurance: >140 years @ 50GB write/erase per day
      -Read Endurance: Unlimited
      -Data Retention: 10 years
    The only known deterrent to upgrading your HDD to SSD would be cost.

    I know I've posted this before but when someone states how the HDD is bottleneck I must enlighten others and bring hope to those in need. Rejoice, for the price of SSD per GB will fall by 50% per year and drive size should double each year as well.
     
  5. AceOfSpades

    AceOfSpades Notebook Consultant

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    wow, thanks for the very informative answers, you guys really do know your stuff! I'll look into SSD's, I had no idea how big of a bottleneck the HDD is!

    I have a quick question while we're on this topic, can you replace your conventional HDD with an SDD on a t61?
     
  6. am6eric9a

    am6eric9a Notebook Geek

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    how many times have u posted that exact same post about the sdd snap? seems like ur everywhere with that
     
  7. Playmaker

    Playmaker Notebook Deity

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    Yea Snap, that post is getting a little long in the tooth. ;)
     
  8. Snap

    Snap Notebook Consultant

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    The SSD vs HDD info has been posted a total of 3x, but slightly altered for each occasion. I'm not pumping my group buy since new orders are no longer being accepted so I didn't see the harm in spreading the joy. Thanks for not burning me at the stake!
     
  9. Stunner

    Stunner Notebook Deity

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    Naw, Snap its good that you enlighten all of us. Keep it up! Very interesting, I didn't know about it since I saw that thread of yours about it.
     
  10. KnightUnit

    KnightUnit Notebook Evangelist

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    Cant wait for SSD, biggest thing since sliced bread
     
  11. mtor

    mtor Notebook Deity

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    Great information thanks