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    Is there a way to increase the GPU bandwidth?

    Discussion in 'Gaming (Software and Graphics Cards)' started by Phistachio, Mar 1, 2011.

  1. Phistachio

    Phistachio A. Scriabin

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    Is it software or BIOS configurable? seeker_moc, I would like your help, since I know your GPU is the same, and you have flashed its BIOS and OC'd.

    So, I only want to increase the bandwidth, because, from what I heard, higher the bandwidth, higher is the res you can play fluently. I think my fillrates and texel fillrates and clocks are OK, I just want to increase the bandwidth a little.

    FYI : Stock bandwidth is @ 25.6Gb/s

    Thanks!
     
    Phistachio, Mar 1, 2011
    #1
  2. Bearclaw

    Bearclaw Steaming

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    OC'ing memory increases bandwidth.

    But you can't physically change from 128-bit to 256-bit.
     
    Bearclaw, Mar 1, 2011
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  3. Phistachio

    Phistachio A. Scriabin

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    No, I'm not talking about bus width :)

    But, how much would I need to OC to get, say, 30Gb/s?
     
    Phistachio, Mar 1, 2011
    #3
  4. Eivind

    Eivind Notebook Evangelist

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    Like he said. OC memory to increase bandwidth.
     
    Eivind, Mar 1, 2011
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  5. xxERIKxx

    xxERIKxx Notebook Deity

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    Yup oc your memory clock. My old 8800m gts could get over 60gb per second when it was overclocked.
     
    xxERIKxx, Mar 1, 2011
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  6. Micaiah

    Micaiah Notebook Deity

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    You'll need to overclock the memory to ~938 MHz to hit 30 GB/s.
     
    Micaiah, Mar 1, 2011
    #6
  7. Phistachio

    Phistachio A. Scriabin

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    What's the equation to know how much clock speed I need for X bandwidth?
     
    Phistachio, Mar 2, 2011
    #7
  8. key001

    key001 Notebook Evangelist

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    overclock by x mhz, write down the mhz and the bandwidth you get say in gpuz, then plug the values @ zunzun.com lol
     
    key001, Mar 2, 2011
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  9. Micaiah

    Micaiah Notebook Deity

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    Don't be lazy.

    (Memory clock speed x Bus width x (2) / 8) / 1000 = Theoretical memory bandwidth in GB/s.

    The 2 in parenthesis is a variable, pending on your memory type. If you have DDR3, it's 2; DDR4 = 3, DDR5 = 4.

    Your HD 5650 has a 128 bit bus width, with GDDR3 memory running at 800 MHz, so...

    ((800 x 128 x 2) / 8) / 1000 = 25.6
     
    Micaiah, Mar 2, 2011
    #9