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  1.    22 May 2017 #1
    Join Date : May 2017
    Posts : 13
    Windows 10

    New 1600MHz RAM runs at 800MHz


    I replaced my old 800MHz 2x4GB RAM with 2 new 8GB RAM modules that work at 1600MHz.
    My motherboard supports these higher speeds and the BIOS also indicated 1600MHz as the supported speed.

    However, when logged in, Windows shows the memory working at 800MHz.

    I attach the CPUID/CPU-Z report and screenshots.
    Note that slots #3 and #4 are empty. I did not mix modules.


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    How can I get the full speed of my RAM modules?
    New 1600MHz RAM runs at 800MHz Attached Files
      My ComputerSystem Spec
  2.    22 May 2017 #2
    Join Date : Aug 2014
    Balayan, Batangas
    Posts : 414
    Windows 10 Pro 64-bit

    I believe you should install the other stick to the 1st slot and the other to the third one.
      My ComputersSystem Spec
  3.    22 May 2017 #3
    Join Date : May 2017
    Posts : 13
    Windows 10
    Thread Starter

    Really? Why is that?
      My ComputerSystem Spec
  4.    22 May 2017 #4
    Join Date : Sep 2015
    Staffordshire
    Posts : 364
    Windows 10 Pro

    It's 800Mhz doubled that gives you 1600, always shows 800 in CPUz you have to multiply it by 2 to get the effective speed.
      My ComputersSystem Spec
  5.    22 May 2017 #5
    Join Date : May 2017
    Posts : 13
    Windows 10
    Thread Starter

    OK, I don't remember it being 400MHz with my 800MHz DIMMs.
    So do I need to actually move one module to Slot #3?
      My ComputerSystem Spec
  6.    22 May 2017 #6
    Join Date : Sep 2015
    Staffordshire
    Posts : 364
    Windows 10 Pro

    Quote Originally Posted by adish View Post
    OK, I don't remember it being 400MHz with my 800MHz DIMMs.
    So do I need to actually move one module to Slot #3?
    It will give you the correct value in the Post.
    As your memory is being identified as dual channel, you don't need to to move anything. Some motherboards such as ASUS need the ram in 1 and 3 or 2 and 4 for dual channel to work, wrong slot and it only works as single channel.
      My ComputersSystem Spec
  7.    22 May 2017 #7
    Join Date : Mar 2017
    Posts : 471
    Win 10 Pro 15063.332 (ex-Insider)

    clam1952 is absolutely correct. Here's another example:

    http://www.overclock.net/t/1346124/c...-at-half-speed
      My ComputersSystem Spec
  8.    22 May 2017 #8
    Join Date : May 2017
    Posts : 13
    Windows 10
    Thread Starter

    Thanks guys!
      My ComputerSystem Spec
  9.    22 May 2017 #9
    Join Date : Nov 2016
    Posts : 431
    Windows 10

    CPU-Z is correct the clock speed is 800 MHz.
    The modules are DDR (Double Data Rate) in this case version 3, hence DDR3.
    So the data rate is 1600.
    Nothing wrong, all is well.

    Look at your MOBO manual to make sure they are in the correct slots for Dual Channel operation. That varies with manufacturer.
      My ComputerSystem Spec
  10.    22 May 2017 #10

    You should always install dual channel memory in alternate slots, so A1 then B1 or A2 then B2.
      My ComputersSystem Spec

 
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