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Install memory not showing total only half

Aopen mother board model s661fxm-7us, specifications for the board show a maximum of 2gb. I intalled 1gb x2 = 2gb and bios boot and system information is only showing 1gb installed.
I installed one 512 and one 1gb and it registured the correct total.
BIOS ver = Phoenix ltd 6.0 pg

I have read that some mother boards/bios do not show the total amount installed but said it is being used?

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  • zuluvector1 Feb 21, 2009

    Thanks for the response Ekse'

    Yes' all specs on mem speed was checked and double checked along with the CL, voltage, DDR all the usual stuff. Memory purchased> Kingston pc3200 cl3 2.6v kvr400x64c3ak2/2g.
    Here's what I did to check mem banks and modules.
    Installed one mem module in first mem bank and then using the same module knowing it was good, installed in the second mem bank; I repeated this action with the second mem module and all tested good. I installed one 1gb and one 512mb and bios and system info read true numbers 1.5gb.
    Checked the bios and no settings available to set bank one or two to enable or disable ecc or any other settings for memory read except to shadow bios and video. K that's my story and I'm sticking to it "lol". I will keep looking to see if there is anything I might have over looked.

    Thanks again Guru'

  • zuluvector1 Feb 23, 2009

    zulu here'

    I suspect that the bios has defaulted to an answer when the mem read is Out of Range at boot. If that is the case then the system can only be using half of what is installed. (I think just answered my own post)

    My concern is that the system is not using the amount installed; if that is the case then I have provided a disservice to my client. If anyone knows of any freeware or software (that won't break the bank) that can bypass the bios and give an accurate read to see how the system is using the mem modules installed, please post.

    My thoughts' if you are going to buy a new MB, make sure the manufacture will guaranty the max mem displayed on the spec sheet will load. I have installed the max on newer machines (4GB) and all was well. I do not believe updating the systems bios (if one is even available) will give me a better answer then what’s been given because the board’s bios (according to the manufacture) will take up to 2GB.

  • zuluvector1 Feb 24, 2009

    Thanks for the tool tip ProsunPal and the additional info.
    The following is the link to the MB manufacture followed by the model and the mem installed.
    Kingston pc3200 cl3 2.6v kvr400x64c3ak2/2g

  • zuluvector1 Feb 25, 2009

    Yep' mem shows that bank 1 & 2 are showing 1gb each installed. That works for me. Thank you again ProsunPal for the cool-tool tip.

  • Thomas F. Schneider May 11, 2010

    Some mother board, and this will be listed in the manual , have a limit to how many pieced Total (electronic chips) are allowed . Does *********** board have this limit?   



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it should show in the bios as 2048.

looking at the details of the motherboard
Memory Type install memory not showing total only half - dtrquestion.gif DDR SDRAM Number of Memory Slots 2 x DIMMs Supported RAM speeds 400 MHz

Got the right speed ram etc?


Posted on Feb 20, 2009

  • Ekse Feb 21, 2009

    When I was looking at the specs, the number 19xx came up, as if it wouldn't support full 2GB. That is odd.

    1GB modules should be supported.


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Use the freeware CPUz. It will give you the actual amount of RAM or everything you installed on your system. If it failed it is the limitation of your motherboard. But don't worry physically your system will use 2GB RAM. Be sure about that. So don't worry.

Posted on Feb 23, 2009

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Maybe you are not using the right speed of ram for your computer.

a place to figure this at is you will download a very little file that will scan your computer and it will tell you exactly what you have for ram and what type and speeds that are compatible with you pc

Posted on Feb 23, 2009

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