memory - RAM limit for motherboard

20
2014-01
  • Bsk

    The specifications page of my motherboard reads:

    Memory:
    - 2 x DDRII DIMM slots up to 2GB
    - Supports 1.8V DDRII DIMM
    - Supports dual channel DDR II 533 DIMM

    I already have a 512MB RAM stick in one of the slots - can I add another 2GB stick in the pending slot? I am confused as the the first line of the above specification reads "up to 2GB".

    Is it 2GB per slot or the overall limit is 2GB?

    Update 1: Further perplexing the case, dmidecode returns the following output:

    Memory Controller Information
    Error Detecting Method: 8-bit Parity
    Error Correcting Capabilities: None
    Supported Interleave: One-way Interleave
    Current Interleave: One-way Interleave
    **Maximum Memory Module Size: 1024 MB
    Maximum Total Memory Size: 4096 MB**
    Supported Speeds: Other
    Supported Memory Types: Other
    Memory Module Voltage: 5.0 V
    Associated Memory Slots: 4
    0x0006
    0x0007
    0x0008
    0x0009

    • Answers
  • Mike Insch

    The user manual for your motherboard is a bit clearer:

    2 DDRII DIMM memory slots (supports up to 2GB memory)

    I would read this as the board supporting a maximum of 2GB installed, not 2GB per slot.

  • TookTheRook

    From this and this link, it seems it supports only up to 2GB in total.


    • Related Question

    ASUS M4A79 Deluxe Motherboard & DDR2 800/1066 Memory Compatibility/Limitation?
  • Jonas Gorauskas

    I am looking to buy a ASUS M4A79 Deluxe motherboard at NewEgg and under the specs there is a note regarding the memory standard for this MB. It says:

    Memory Standard:

    • DDR2 1300(O.C.)/1200(O.C.)/1066 * /800/667
    • ECC,Non-ECC,Un-buffered Memory
    • Due to AMD CPU limitation, DDR2 1066 is supported by AM2+ / AM3 CPU for one DIMM per channel only.

    What does the limitation emphasized above means in layman's terms? The MB supports 16 GB of memory and it seems like the only way to max it out is by using DDR2 800 4G modules X 4. Is that a correct assumption? The main use for the system I'm building is as a development workstation that will run several VMs.


    • Related Answers
  • hanleyp

    What it is saying that DDR2 800 and 667 is supported for all 4 DIMM slots. If you use DDR 1066, AMD specifies that DDR2 1066 is specified to work with only 1 DIMM per Channel (2 DIMM slots). If you add more memory or faster memory, then you are going outside the processor manufacturer's specifications (I believe O.C. here stands for "Over Clocking").

    There is mention just under the memory support statement "Refer to www.asus.com for the memory QVL (Qualified Vendors Lists)." This means that Asus has tested specific DIMM modules and have found that they work with this specific motherboard. (Unfortunately, I can't find the QVL for this motherboard on ASUS' website.) The QVL gives information about which DIMM model they used and in which DIMM slots they passed. If a DIMM module is on the AVL as passing and it is greater than 1066 or 1066 with 4 DIMMs populated, then this means ASUS tested it and it works.

    So, your assumed limitation is correct if you select memory not on the QVL.

  • Troggy

    That is a correct assumption. Using an AM2+/AM3 cpu would limit you to two slots if you were using 1066 DDR2. You are correct in how to maximize that mb's ram with 4 - 4gb DDR2 800 sticks.

  • Notorious Arab

    So u would need 4 of these. As Troggy said, you are correct.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16820134863