The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
Problems? See this thread at archive.org.

    nvidia gtx 680m clock 900 MHz or 1800 MHz ???

    Discussion in 'Alienware 17 and M17x' started by antriach, Mar 20, 2013.

  1. antriach

    antriach Notebook Guru

    Reputations:
    0
    Messages:
    60
    Likes Received:
    0
    Trophy Points:
    15
    Hi mates,

    I have a nvidia gtx 680m, and I have a small question, what is the actual speed of the memory?

    The reason I ask is that in many places and seen that are 1800MHz but in others it is only 900MHz.

    In my case the gpu-z 900MHz mark me, but nvidiInspector 1800MHz.

    Any reason?

    Dell OEM card.

    gpu-z.gif nvidia_20130320_103951.png


    THX
     
    antriach, Mar 20, 2013
    #1
  2. unphoto

    unphoto Notebook Evangelist

    Reputations:
    155
    Messages:
    348
    Likes Received:
    22
    Trophy Points:
    31
    It's supposed to by looked at x2 :)
    so it's 1800Mhz :) so it's good.

    You check with a different program (i think CPU-ID/Z) and that will usualy show the x2 value.
     
    unphoto, Mar 20, 2013
    #2
  3. Meaker@Sager

    Meaker@Sager Company Representative

    Reputations:
    9,436
    Messages:
    58,194
    Likes Received:
    17,902
    Trophy Points:
    931
    900mhz GDDR5 = 1800 DDR = 3600 QDR

    Because there are many "clocks" when dealing with ram it can be quite confusing.
     
    Meaker@Sager, Mar 20, 2013
    #3
  4. unphoto

    unphoto Notebook Evangelist

    Reputations:
    155
    Messages:
    348
    Likes Received:
    22
    Trophy Points:
    31
    A basic answer would be:

    DDR (any kind) = Dual Data Rate.
    So some tools show the single data rate (your 900Mhz for example), but more common is the dual data rate number (your 900Mhz x2 = 1800Mhz)
     
    unphoto, Mar 20, 2013
    #4
  5. Meaker@Sager

    Meaker@Sager Company Representative

    Reputations:
    9,436
    Messages:
    58,194
    Likes Received:
    17,902
    Trophy Points:
    931
    While nvidia often advertise the quad data rate.
     
    Meaker@Sager, Mar 20, 2013
    #5
  6. unphoto

    unphoto Notebook Evangelist

    Reputations:
    155
    Messages:
    348
    Likes Received:
    22
    Trophy Points:
    31
    Stop confusing him :D, that was not his question :p
     
    unphoto, Mar 20, 2013
    #6
  7. antriach

    antriach Notebook Guru

    Reputations:
    0
    Messages:
    60
    Likes Received:
    0
    Trophy Points:
    15
    OK, thx mates,

    I was a little confused, Thanks for your help.
     
    antriach, Mar 20, 2013
    #7