Windows 10: New 1600MHz RAM runs at 800MHz Solved

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  1.    22 May 2017 #11

    swarfega said: View Post
    You should always install dual channel memory in alternate slots, so A1 then B1 or A2 then B2.
    Is that so?
    This implies they have to be in order.
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  2.    22 May 2017 #12

    I found this in the mobo manual (pp16):
    Click image for larger version. 

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    So apparently, IIUC, I need to split them.
    Attached Thumbnails Attached Thumbnails image.png  
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  3.    22 May 2017 #13

    Can't argue with the manual, nothing to loose by doing it.
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  4. Posts : 1,852
    Win 10 X64 Pro 1803 17751.1
       22 May 2017 #14

    Most people don't have motherboards that support quad channel memory. (Dual channel is much more common.)

    I'm a little surprised that your X79 board offers so much flexibility for dual and 3 channel memory configurations, but that's cool.

    (I have two quad channel desktops. Ones is an X79 system like yours, and the other is an X99 system. I run quad memory in both, even though its advantage is probably only detectable in synthetic benchmarks.)
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  5.    22 May 2017 #15

    So now I have 2x8GB-1600MHz installed, 2 empty slots and 2x4GB-800Mhz extra sticks.
    What's the best configuration to install the spare sticks?
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  6. Posts : 1,852
    Win 10 X64 Pro 1803 17751.1
       22 May 2017 #16

    adish said: View Post
    So now I have 2x8GB-1600MHz installed, 2 empty slots and 2x4GB-800Mhz extra sticks.
    What's the best configuration to install the spare sticks?
    It may not matter. I believe that the DIMMs all need to be of the same capacity for quad channel operation.

    (I wouldn't be deeply shocked to find that's not correct, though.)

    You may not find this helpful, but if you could get another couple of 8GB DIMMs and throw them in for quad channel, why not? (This assumes that the RAM would be compatible. That's not guaranteed. I bought my RAM in quad channels kits.)
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  7.    23 May 2017 #17

    Thanks, but I already have the two unmatched pairs.
    What is the best way to install them together within my available mobo and sockets?
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  8.    23 May 2017 #18

    DDR3 800 RAM Never seen DDR2 RAM put in a DDR3 Slot but whaddo I know

    According to Wikipedia they exist, but I've Never seen a single module
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  9.    23 May 2017 #19

    Just wondering if that 800 MHz Ram is actually DDR3 1600 MHz and it was assumed to be 800 because of the GPUz readings.
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  10. Berton's Avatar
    Posts : 5,281
    Win10 Home and Pro, Win10 Insider Preview, WinXP Home Premium, Linux Mint
       23 May 2017 #20

    clam1952 said: View Post
    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.
    To add for ASUS, my latest M52_M32 has 4 black slots labeled as A1, A2, B1 and B2. Putting 2 modules in A1 and A2 work as Single Channel, putting the 2 modules in A1 and B1 work as Dual Channel. Just goes to show there could be issues in assuming how things go together hence the need for the manual. My 2 Gigabyte boards have 2 slots of black and 2 slots of blue, alternating. All 3 boards AMD-based, Intel-based boards may be different. Or as frequently like to say on the 'net and texting, YMMV.
      My ComputerSystem Spec

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