Question about Biostar U8668 Motherboard

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DDR Files I have a Biostar U8668 MoBo not a U8668D and I've been trying to fix a problem where the MoBo won't let me use the 2GB's of Ram that the card has sockets for. I've downloaded the lastest bios for my MoBo (U8668R20.bin) but it did not change the problem. I saw that the U8668D MoBo is the same expect that is does not have sockets for SDRam. I know its scary, but I tought I could use the U8668D Bios on my MoBo, because I read that it fix a problem on that MoBo that was like my problem. So I try to flash it to my MoBo and all I get is a message, "Bios ID not a match" or Bios Check Sum Fail". I also saw that the file ext. was different from mine(U8668R20.bin - U8668DR33.DDR). Does anybody Know if I can do what I'm trying or am I up the creek?  P.S I try to e-mail Biostar 10 times but they never answer.

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  • TomC9000 Jan 12, 2008

    Wrong choose of words Nitrotrike, what I mean is there is a conflict or bottleneck with the Graphics and the Ram. When I have dimms in doth sockets the Computer Info reads that I have 2048mb of ram but all my graphic software(Photoshop, F1C,GTR2,games) reads that I have a -2048mb of ram, which only lets the software run at a low object and texture detail. When I remove one dimm from either socket (1GB) all the graphic software will run at full object and texture detail, and that I have 1024 mb of ram. I have try 5 Graphics Card(AGP) and the onboard Graphics, all with the same result. I was told that this was a mapping problem with bios and MoBo and that a update would fix it.

  • TomC9000 Jan 12, 2008

    Sorry about that Nitrotrike, Do you know if I'm on the right track or is the MoBo just to old to fix?

  • TomC9000 Jan 12, 2008

    Thanks for your help I guess it time to break out the Mastercard$$

  • brian c
    brian c May 11, 2010

    (Your*)

    *damn typos*

  • brian c
    brian c May 11, 2010

    You're heart is in the right place, but if it is an older board it may just not be possible. Even new boards have that problem.

    When I ran Vista64 as a test, I had 4gb installed. Everything was fine until I installed the second video card. The system then read it as 2.7gb. Yes, a 1.3gb drop in available memory. Just the nature of the board.

  • brian c
    brian c May 11, 2010

    Ok, that clarifies things. Yes, it has to do with memory mapping, and it's most likely just the nature of the northbridge / southbridge.

  • brian c
    brian c May 11, 2010

    Please be more specific... what do you mean "wont let" you use it?

    Do you just get the infamous "beeeep beeeeep" when you turn it on?

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Here is the correct bios for your board.
http://www.biostar-usa.com/mbdownloads.asp?model=U8668

Posted on Jan 12, 2008

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I've heard of this happening on several mainboards. It has to do with memory mapping. Have you tried flashing to the latest version BIOS?

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