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.

    Need some advice..

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by MrSquirrel, Sep 2, 2005.

  1. MrSquirrel

    MrSquirrel Notebook Enthusiast

    Reputations:
    0
    Messages:
    21
    Likes Received:
    0
    Trophy Points:
    5
    Hello, I recently bought my Acer TM4402 and what I first noticed when I ran CPU-Z, the cpu fsb and ram fsb are not in 1:1 ratio! Would it make a difference if I got ddr400 ram? Also, when adding a new stick of ram, you only have to match the pc-xxxx right? And the model/manufacturer doesn't matter?

    This is my first post btw, and thanks! :D
     
    MrSquirrel, Sep 2, 2005
    #1
  2. Xplodin

    Xplodin Notebook Consultant

    Reputations:
    1
    Messages:
    150
    Likes Received:
    0
    Trophy Points:
    30
    MrSquirrel,

    Right now i'm running on DDR400 Ram and i'm not noticing much difference. Than the old DDR333. But If your adding a new stick of ram then Yes they have to match the PC 2700 or PC3200. If they dont match then the lower of the two will restrict the high speed memory. So if you have a PC2700(333Mhz) and you have a PC3200(400Mhz) then the PC3200 will be forced to run at PC2700. I'm not sure if you gain anything from running at a lower speed. Maybe lower Temp. But if you need more info on Compadablity go to http://www.corsair.com/ and they should have something on their site.
     
    Xplodin, Sep 2, 2005
    #2
  3. MrSquirrel

    MrSquirrel Notebook Enthusiast

    Reputations:
    0
    Messages:
    21
    Likes Received:
    0
    Trophy Points:
    5
    Oh yeah, I forgot to mention my cpu fsb is 200 and my ram fsb is 166, so thats like a 5:4 ratio? That's why I'm asking if upgrading to ddr400 would make a difference.

    Thanks again for your help.
     
    MrSquirrel, Sep 3, 2005
    #3
  4. thephenom

    thephenom Notebook Geek

    Reputations:
    0
    Messages:
    82
    Likes Received:
    0
    Trophy Points:
    15
    A64 memory dividers doesn't work that way.

    Your memory speed is dependant on your CPU speed as well as your CPU multiplier and Memory.

    Let's say you have a 2Ghz Turion.
    Then you're running at 200x10, your next ram divider would be 11. So your ram would be running at 2000Mhz/11 = 181.81Mhz and the following at 2000Mhz/12 = 166.67 (DDR333)

    But if you have a 1.8Ghz Turion, then your default would be 200x9, first divider would be at 10, 1800Mhz/10 = 180Mhz, and then 1800/11 = 163.63Mhz

    Upgrading from 333 to 400 will have some difference, very noticeable? Probably not.
     
    thephenom, Sep 3, 2005
    #4