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Thread: Not Optimum Mode




  1. #1
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    Default Not Optimum Mode

    ...since upgrading from my Gigabyte HD4850 to an Gigabyte HD6850 - inside Windows all is well but outside the card can't handle dos screens like bootup or in bios? Extremely annoying coz it's switching off my screen after a short while.

    No such problem with my old 4850 card - why with my new Gigabyte HD6850 OC R685OC-1GD?

    any fix for this?
    Attached Images Attached Images Not Optimum Mode-nom1-001-jpg 
    Last edited by PhenomII Dude; 08-09-2011 at 05:14 AM.
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  2. #2
    Chike is online now Senior Member
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    Default Re: Not Optimum Mode

    Seems more like the screen not the card.
    No way to make it learn special profile settings?

  3. #3
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    Default Re: Not Optimum Mode

    Not that I know of, Chike!

    If it's the screen why didn't show this problem with my 4850 card? Seems to indicate a bios problem with the card, no?
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  4. #4
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    Acebmxer is offline Gigabyte Elite
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    Default Re: Not Optimum Mode

    Sound to me a compatibility issue between the GPU and the Monitor. It sounds like the GPU is booting at resolution that your monitor does not like. If you have another monitor to try on I bet you would have no issues.
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  5. #5
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    Default Re: Not Optimum Mode

    The GPU must boot in DOS text screen mode (80x25) or it's a bios setting fault no?

    I know it seems to be the Samsung monitor playing a role BUT it does not explain WHY there was no issue with the 4850 card (GV-R485OC-1GH)

    ..and nope no other monitor available.
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  6. #6
    Chike is online now Senior Member
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    Default Re: Not Optimum Mode

    If i remember correctly I had something like this with my BenQ 17" monitor, though it never turned off.
    All I had to do is save the settings as tthey are and never saw the message again.
    It says what it wants but not what the mode actual is, maybe ask samsung support.
    From the manual:
    Q: Can you see "Not Optimum Mode", "Recommended Mode 1920 x 1080 60 Hz" on the screen?

    A: You can see this message when the signal from the video card exceeds the maximum resolution
    and frequency that the monitor can handle properly.

    A: Adjust the maximum resolution and frequency that the monitor can handle properly.

    A: If the display exceeds SXGA or 75 Hz, a "Not Optimum Mode", "Recommended Mode 1920
    x 1080 60 Hz" message is displayed. If the display exceeds 85 Hz, the display will work properly
    but the "Not Optimum Mode", "Recommended Mode 1920 x 1080 60 Hz" message appears
    for one minute and then disappears.
    Please change to the recommended mode during this one-minute period.
    (The message is displayed again if the system is rebooted.)

  7. #7
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    Default Re: Not Optimum Mode

    Mate,
    it's fairly obvious it's not the monitor as, again, the 4850 (DVI plug) did work fine in DOS screen modes - it's just the 6850 who got that problem in EXACTLY the same machine.

    Logically, and there is no way around it, the 4850 did something right what the 6850 is doing wrong - sounds plausible?! perfectly plausible to me :)

    Btw, I've nothing in the OSD resolution wise
    Last edited by PhenomII Dude; 08-09-2011 at 07:41 AM.
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  8. #8
    Chike is online now Senior Member
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    Default Re: Not Optimum Mode

    If it's not the monitor then find me another monitor that's nt samsung with the same behaviour.
    The card does not give that message.
    It's easy to se that the screen is readable, optimum mode or not.
    The monitor shuts the image after a minute despite the fact there is visable problem.
    If the monitor only supports SXGA maybe it's time to buy a new one.

  9. #9
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    Default Re: Not Optimum Mode

    The message is the monitor BUT triggered by the 6850 as proven in my case - what's so difficult to understand here? Simple "mechanic" really!

    I know other monitor brands have this annoying feature disabled but it does not fix the apparent problem it just skips it - see that?
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  10. #10
    Chike is online now Senior Member
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    Default Re: Not Optimum Mode

    It's easy (relatively) to find where the problem is.
    You can try another brand HD 6850 and see if the problem disapears.
    If it doesn't then you have 2 choices, in fact 3:
    Go bacj to the 4850
    Stay with the HD 6850 and the problem as it is (you can get image back if you switch sources i believe).
    Or buy a new monitor that "disables" the problem, or support the mode it start with.

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