Can i use 2 512 mb stix and 2 1 gig stix in a dual chanel mobo

i have A8N-SLI premium ASUS mobo and i put the two 1 gig stix in the blue slots and the
two 512 mb stix in the black slots, all are same speed and same manufature, it boots and runs fine
but it doesnt seem to be any faster, computer reeds all 3 gigs of mem but would it be faster to use just the two 1 gig stix
on a single channel
7 answers Last reply
More about stix stix dual chanel mobo
  1. Single channel is slightly slower than dual channel. If your system didn't require more memory, i.e., there was no swapping, then adding memory couldn't make it faster. Running 2 GB instead of 3 GB certainly can't make it faster. You now have enough memory to load large documents, etc.
  2. so im assuming that it is ok to run one channel on 2 one gigs stix and the other channel on two 512 mb stix im a noob and dont know if ther was any swapping
    or not. but i do know that xp 32 bit will only use up to almost 4 gig, so will i see a differance if i install a 1 gig stik in each slot for a total of 4 gig
  3. Your setup is fine. On most systems, XP can use up to 3.25 GB of memory. Increasing memory to 4 GB will provide absolutely no benefits.
  4. thanks for you time and answer it is greatly appreciated
  5. Very good advice above!


    > would it be faster to use just the two 1 gig stix on a single channel

    The way you have phrased that, you would be putting
    one 1 GB stick in the first blue DIMM slot, and
    one 1 GB stick in the first black DIMM slot
    (counting outwards from the CPU socket):

    http://www.newegg.com/product/product.aspx?item=N82E16813131540


    This would be slower, because you would force the
    motherboard to operate in single-channel mode.

    Dual-channel mode is faster, but possibly not by
    enough of a difference for you to notice it
    without careful measurement software.

    The two blue slots are typically called "Channel A"
    and "Channel B".

    Likewise, the two black slots are also called "Channel A"
    and "Channel B".

    To achieve dual-channel operation, one needs to
    put identical DIMMs in opposite channels.

    Installing the 1GB sticks in the blue DIMM slots
    will assign those RAM modules to the lowest
    hardware addresses in your memory subsystem.

    Similarly, installing the 512MB sticks in the
    black DIMM slots will assign those RAM modules
    to the highest hardware addresses.


    It should work BEST with a total of 3 GB
    all operating in dual-channel mode.


    p.s. I've read a lot of ASUS motherboard manuals,
    and this is the color scheme ASUS adheres to:
    please confirm the advice above by finding the
    section of your User Manual that discusses
    DIMM installation:

    http://usa.asus.com/product.aspx?P_ID=e1h9yUaMZAsTwIEN


    MRFS
  6. From your motherboard manual:




    Hope this helps.


    MRFS
  7. Thanks it seems i got a bad wire from the sales guy at frys electronics
    ok so i looked at the diagram you posted (thanks by the way) and i swapped the
    memory around i.e. first blue first black now have the one gig stix, and the
    second blue and black now have the 512 mb stix, and you are so right i really
    cant tell a differance, is this what you mentioned in your post?
    although i have built two computers M3A76CM im going to go back through them
    both and make sure they are in the right config as per your post
    i had manuals with them and both ASUS mobos were very easy to build
    but this computer was given to me with no mobo manual, the owner had norton
    on it and it was still infected and was locking up and he didnt know what to do so he
    bought a laptop and gave me his problem, (HE HE) sweet, cause at the time i think it
    was about $900 to build this one so i yanked norton and installed PCtools Spywear
    Doctor/Anti virus and there Regestry Mechanic, Shed a few ungodly huge games and
    softwear and WHALHA i think i can sell it for a few bucks.
    Thanks Again

    MRFS said:
    Very good advice above!


    > would it be faster to use just the two 1 gig stix on a single channel

    The way you have phrased that, you would be putting
    one 1 GB stick in the first blue DIMM slot, and
    one 1 GB stick in the first black DIMM slot
    (counting outwards from the CPU socket):

    http://www.newegg.com/product/product.aspx?item=N82E16813131540


    This would be slower, because you would force the
    motherboard to operate in single-channel mode.

    Dual-channel mode is faster, but possibly not by
    enough of a difference for you to notice it
    without careful measurement software.

    The two blue slots are typically called "Channel A"
    and "Channel B".

    Likewise, the two black slots are also called "Channel A"
    and "Channel B".

    To achieve dual-channel operation, one needs to
    put identical DIMMs in opposite channels.

    Installing the 1GB sticks in the blue DIMM slots
    will assign those RAM modules to the lowest
    hardware addresses in your memory subsystem.

    Similarly, installing the 512MB sticks in the
    black DIMM slots will assign those RAM modules
    to the highest hardware addresses.


    It should work BEST with a total of 3 GB
    all operating in dual-channel mode.


    p.s. I've read a lot of ASUS motherboard manuals,
    and this is the color scheme ASUS adheres to:
    please confirm the advice above by finding the
    section of your User Manual that discusses
    DIMM installation:

    http://usa.asus.com/product.aspx?P_ID=e1h9yUaMZAsTwIEN


    MRFS
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