memory frequency changed in bios


  1. Posts : 33
    Windows 7 Ultimate x64 Build 7601
       #1

    memory frequency changed in bios


    Hello,
    I was wondering i changed the frequency in the bios from automatic to 400MHz.
    I got 2x2GB DDR2_800 400MHz so does this setup improving my system or does it have bad effects?

    Friendly kinds,
    Joshua Mitchell

    Edit: where stand the "800" for?
      My Computer


  2. Posts : 72,058
    64-bit Windows 11 Pro for Workstations
       #2

    Hello Joshua,

    It depends on what your BIOS showed the RAM MHz speed as while it was on automatic.

    What brand and model number is your RAM?
      My Computer


  3. Posts : 33
    Windows 7 Ultimate x64 Build 7601
    Thread Starter
       #3

    Crosair 2GB ddr2 800
    But he only shows 400MHz in my bios, and its a 800MHz or I'm i not right,

    Edit: Ill make a picture but its allready late so ill post it tomorrow ^^
      My Computer


  4. Posts : 72,058
    64-bit Windows 11 Pro for Workstations
       #4

    If they are Crosair 2GB ddr2 800, then yes they could run at 800MHz.
      My Computer


  5. Posts : 33
    Windows 7 Ultimate x64 Build 7601
    Thread Starter
       #5

    Brink said:
    If they are Crosair 2GB ddr2 800, then yes they could run at 800MHz.
    But why can i only change it up to 400MHz @ my bios in stead of 800MHz

    I have 3 options:

    Auto,
    333MHz DDR2_667
    400MHz DDR2_800
      My Computer


  6. Posts : 72,058
    64-bit Windows 11 Pro for Workstations
       #6

    Ah, ok. Here's what's going on.

    DDR2-800 is the same thing as PC2-6400, and runs at a memory bus clock speed (frequency) of 400MHz. However, being DDR2 (DDR2 stands for Double Data Rate type 2) it transfers 2 "chunks" of data per clock cycle with an "effective" transfer rate of 800 MT/s.

    It's basically just a bit misleading. You're RAM is actually 400MHz, but effectively like 800MHz. Thus they label as "DDR2 800".

    Double data rate - Wikipedia, the free encyclopedia
    Last edited by Brink; 09 Feb 2013 at 09:08. Reason: typo
      My Computer


  7. Posts : 33
    Windows 7 Ultimate x64 Build 7601
    Thread Starter
       #7

    Brink said:
    Ah, ok. Here's what's going on.

    DDR2-800 is the same thing as PC2-6400, and runs at a memory bus clock speed (frequency) of 400MHz. However, being DDR2 (DDR2 stands for Double Data Rate type 2) it transfers 2 "chunks" of data per clock cycle with an "effective" transfer rate of 800 MT/s.

    It's basically just a bit misleading. You're RAM is actually 400MHz, but effectively like 800MHz. Thus they label as "DDR2 800".

    Double data rate - Wikipedia, the free encyclopedia
    Aaaah okay thanks for the information
    Its to bad thats the memory only can be modify up to 400MHz.
    Btw @ my motherboard i see where my memory goes on (memory slot) the same value of 800MHz
    So my motherboard supports a DDR2 800MHz bank.
    I allready flashed my BIOS into the last version (2.10).

    Still glad you could help me i appreciate it ^^
    Last edited by Brink; 09 Feb 2013 at 09:08. Reason: typo
      My Computer


  8. Posts : 72,058
    64-bit Windows 11 Pro for Workstations
       #8

    You're most welcome. :)
      My Computer


 

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