please help....about dual channel memory...

By RobinHood
Nov 5, 2006
Topic Status:
Not open for further replies.
  1. i have a 3.00 ghz processor a 512 mb ram a 256 vram and 160 gb hard disk
    will it help me if i install a 1 gb dual channel memory ? in total i will have 1 gb and 512mb ram, am i correcet? will my computer work well if i install de dual channel memory???

    i have a 3.00 ghz processor a 512 mb ram a 256 vram and 160 gb hard disk
    will it help me if i install a 1 gb dual channel memory ? in total i will have 1 gb and 512mb ram, am i correcet? will my computer work well if i install the dual channel memory???:confused: :confused: :confused: :confused: :confused:
  2. howard_hopkinso

    howard_hopkinso Newcomer, in training Posts: 25,948   +19

    Please stop opening new threads/posts for this problem.

    Regards Howard :)
  3. RobinHood

    RobinHood Newcomer, in training Topic Starter

    ..

    but can u help me please!!!!!!!!
  4. howard_hopkinso

    howard_hopkinso Newcomer, in training Posts: 25,948   +19

    Just be patient and I`m sure someone will reply to your problem.

    If no one replies, after 24 to 36 hours you can bump this thread.

    Regards Howard :)
  5. Grafficks

    Grafficks Newcomer, in training Posts: 454

    I don't get what you're planning to do here.
    You say you currently have 512MB memory, and you want to add 1GB, but that still does not give you Dual-Channel...

    Dual channel memory means two RAM sticks which are completely identical, and are inserted on the same-colored DIMM slots on the motherboard.

    First check if your motherboard supports dual channel memory.

    If you add a 1GB stick of RAM, it will not be dual channel, since you will have one stick of 1GB and another of 512MB.

    If you want dual channel then you need another 512MB stick of RAM which has to be exactly the same speed and size as your other 512MB RAM module.

    I hope that answers your question. If not, then please re-word your question.
  6. RobinHood

    RobinHood Newcomer, in training Topic Starter

    so..

    i have a normal 512 mp ram and i wanna install a dualchannel 1gb ram ...u say i can't?
  7. Grafficks

    Grafficks Newcomer, in training Posts: 454

    Erm..this is where I think you misunderstand the whole Dual Channel thing. Let me explain. "Normal" and "Dual Channel" are not types of RAM.

    It cannot be a 1GB dual channel RAM. Dual-channel is always plural, since there's two sticks. A 1GB module cannot be named Dual Channel, because DualChannel means two.

    If you want dual-channel,

    I hope that answers your question. Post again on any other uncertainties.
  8. RobinHood

    RobinHood Newcomer, in training Topic Starter

    i have a 512 mb ram ddr and this is what i want to add (dual channel memory)http://www.turbozone.ro/modul/produse/583.html
    ok? ;)

    can i install it? will it cause problems to my computer?

    DDRAM 1GB PC3200 DualChannel KIT is the name of the memory i want to buy and install
  9. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,684   +153

    You can install this memory, but it will not run as dual channel unless the motherboard supports dual channel operation
  10. Grafficks

    Grafficks Newcomer, in training Posts: 454

    If your motherboard supports Dual Channel memory, then yes it will be fine, you can install it and it will be dual channel.
  11. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,684   +153

    Didn't I just say this in my previous post?
     
  12. Grafficks

    Grafficks Newcomer, in training Posts: 454

    whoops..:blush:


    EDIT: Hey another thing I just thought about. After RobinHood gets his 1GB dual channel kit, what could he do with that remaining 512MB RAM (the one he currently is using)? Is it possible to add a third module to a Dual Channel configuration, without disrupting the first two?
  13. KingCody

    KingCody TechSpot Guru Posts: 1,568   +7

    generally speaking to run memory in dual channel mode (assuming the memory controller supports it) you must install an even number of matched* memory sticks.

    *= matched sticks are identical in type, speed, latency, density, & size. some memory controllers are pickier than others about matched RAM. sometimes you can get away with running two unmatched sticks of same size RAM in dual channel, but to be on the safe side it is always recommended to run only matched sticks.

    this means that if Grafficks installs the 1GB "dual channel kit" alone, it should run in dual channel, if he installs the 1GB "dual channel kit" alongside the original 512MB stick, the system will have an odd number of memory sticks, as a result it will only run in single channel mode (if it boots at all)

    P.S. -there were a few [triple RAM slot] Intel-based motherboards in the past that would allow dual channel operation with 3 memory sticks, but only in certain configurations. 1 stick had to equal the sum of the other two sticks combined (for example slot#1=512MB, slot#2=256MB, slot#3=256MB). I am not sure which models supported this and I am also not aware of any AMD-based motherboards that ever supported it.

    cheers :wave:
  14. Tedster

    Tedster Techspot old timer..... Posts: 10,074   +13

  15. RobinHood

    RobinHood Newcomer, in training Topic Starter

    So,, what i understand is: i can't install a dual channel kit with 1 gb cuz i have a 512 ram i'm a little confused:confused:

    This is my motherboard : gigabyte 8i915PL-G
  16. Superinc

    Superinc Newcomer, in training Posts: 106

    thats funny, cuz I have 2 512 Corsair XMS stick in dual channel when I ran a second generic 512mb stick, it still showed up as "Dual Channel mode" in bois info... and yes read 1.5Gbs. there was also a slight performance increase..
    Crazy cuz memory is suppose to run at the lowest(slowest) stick timmings.
  17. RobinHood

    RobinHood Newcomer, in training Topic Starter

    ...

    can i install a dual channel kit of 1 gb if i have 512 ram???????
  18. Gars

    Gars TechSpot Enthusiast Posts: 228

    no, you should remove the old 512 stick and then install 1gb kit to get dual channel
    if you leave the old 512 stick in the slot and put the new kit there is no way to get dual channel
    1x512+2x512= 3 sticks, for dual channel you need 2 or 4
  19. RobinHood

    RobinHood Newcomer, in training Topic Starter

    but..

    but he said ::
    thats funny, cuz I have 2 512 Corsair XMS stick in dual channel when I ran a second generic 512mb stick, it still showed up as "Dual Channel mode" in bois info... and yes read 1.5Gbs. there was also a slight performance increase..
    Crazy cuz memory is suppose to run at the lowest(slowest) stick timmings.

    so he has the same settings
  20. Sharkfood

    Sharkfood TechSpot Guru Posts: 1,198

    Wow, this thread is quite the mess as there is a lot of conflicting information!

    To finalize what you need to know RobinHood:

    No, you CANNOT have Dual-Channel with an odd number of memory sticks. You need 2 or 4 memory sticks and each pair needs to be identical in order to have dual-channel. If your 512mb now is 2x256mb, then you can add that 2x512mb (1 gig) kit along with your 2x256mb (512mb) and obtain 1.5 gig, dual-channel as you'll have four sticks.

    Whoever tries to tell you they have dual-channel with 3 sticks is confused as it's not possible. It doesn't matter if it's "reported" as dual-channel, whatever is reporting this is wrong. It isn't physically possible. It's rarely possible if they are confused with an AMD/Athlon thing known as "DualDDR" which can work and designed for THREE sticks, but this is not dual-channel, has no relation to dual-channel, and is only muddling and complicating the facts/help here.

    You have an Intel-chipset, dual-channel capable motherboard. You will need memory in PAIRS of identical types in order to achieve dual-channel. It's as simple as that. That 1gig dual-channel kit you linked will work well BY ITSELF as it's 2x512mb sticks. Whether or not you can use your 512mb and still remain in dual-channel will depend how your 512mb is allocated. If it's one stick, no- using it will make all 3 sticks single-channel. If it's 2x256mb, then yes, you can use it along with your 2x512 and all four sticks will run in dual-channel mode.
  21. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,684   +153

    Thanks for the final correct info Sharkfood. I wasn't confused, but many others were. RobinHood, have you ever wondered why some memory is sold in matched pairs? They are needed for dual-channel operation...
  22. KingCody

    KingCody TechSpot Guru Posts: 1,568   +7

    to clarify the "conflicting information" here...

    In most cases, you must run an even number of matched RAM sticks (2 or 4) for dual channel, but on certain motherboards, it is indeed possible to run memory in dual-channel with 3 RAM sticks. see here for more info.
    I had only heard of Intel boards supporting it, but according to Superinc's post, his AMD-based Abit NF-7 (if he is referring to the system in his signature) also supported it as well. whether it supports it or not is motherboard/memory controller specific.

    RobinHood, read your motherboard manual to see if it supports dual channel in odd numbered configurations, and if so, what slots they need to be in. if you don't have the manual then you can download it from Gigabyte's website.

    :wave:
  23. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,684   +153

    So if in the case above Channel A's total is 2GB, Channel B would have to be a single 2GB stick?
  24. Sharkfood

    Sharkfood TechSpot Guru Posts: 1,198

    That is basically the "DualDDR" configuration, which isn't quite the same as Dual-Channel, albeit you will have two channels, one for read, one for write but with limits on many operations. (i.e. not truly "dual-channel").

    DualDDR is more popular (and supported) on AMD systems as they allow two banks that add-up to the third bank. This was commonplace as many only shipped with 3-DIMM slots. You could, in essence, add two(2) 512mbs, then a single 1gig to achieve the distinct channels.

    In the case of the 90% though, you wont find bios or memory controller support on generic mainboards with any of this. Dual-channel on most 3rd party motherboards (and BIOS's) is limited solely to memory pairs for full-utilization and two channel memory operation.
  25. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,684   +153

    I have only seen Intel Desktop Boards with Dual Channel bios and Dual Channel capability. I suppose other hi-end manufacturers have dual channel boards too
Topic Status:
Not open for further replies.


Add New Comment

TechSpot Members
Login or sign up for free,
it takes about 30 seconds.
You may also...


Get complete access to the TechSpot community. Join thousands of technology enthusiasts that contribute and share knowledge in our forum. Get a private inbox, upload your own photo gallery and more.