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Computer Not Detecting Samsung SA300: HDMI, D-Sub->DVI Adapter, Optimus e-Sport PC, Iiyama G-Master

WN422G 36735 20
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How can I connect a Samsung SA300 VGA monitor to a PC with a GTX 1070 so that it is detected and displays an image?

The Samsung SA300 is an analog VGA monitor, so a passive D-Sub/DVI adapter will not help if the graphics card output is digital only; you need an active digital-to-analog converter [#17312555][#17312860] The motherboard HDMI/VGA ports belong to the integrated graphics, so they only work if the integrated GPU is enabled in BIOS and used in parallel with the GTX card [#17321856][#17329323] In this thread the real issue turned out to be that the graphics card had 3 DisplayPort outputs, not a usable HDMI output for that monitor, so the user bought the wrong adapter [#17336306] After buying a DisplayPort-to-VGA adapter, the monitor started working [#17382600] If the picture is blurry, the adapter or VGA signal quality/settings may still need adjustment [#17382600]
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  • #1 17312400
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    Hello,
    I don't want to start a new topic and I have a very similar problem:
    I bought an Optimus e-sport extreme desktop computer. I have the iiyama g-master monitor connected to it via HDMI and when I connected it to the panel on the back of the computer, the computer did not see it. Only when I connected the monitor to the HDMI input on the graphics card, only then did the image appear. And now the question, I have a second Samsung SA300 monitor with an analog connection. When I connected them to the computer, the computer does not detect it, I bought a d-sub adapter -> dvi connected to the graphics card and the computer still does not detect the Samsung monitor.
    I read somewhere that you need an analog cable adapter. The seller in the store, when I asked him about such an adapter, said that I have to combine in the monitor settings.
    What should I do?

    best regards

    I separated as a new topic. Do not attach to other people's threads. RADU23
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  • #2 17312555
    badboy84
    Level 43  
    Posts: 8749
    Help: 1197
    Rate: 1483
    I am sure to write what kind of graphics card it is. If the graphics card has digital connectors and the monitor is analog, it has a right not to work.
  • #3 17312846
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    NIVIDIA GeForce GTX 1070 8GB RAM. How can I connect such a monitor to my computer?
  • #4 17312860
    310artur
    Level 43  
    Posts: 9002
    Help: 980
    Rate: 670
    Analog to digital converter. If you still have a free HDMI socket in the GTX, buy an HDMI-DSUB converter.
    Computer Not Detecting Samsung SA300: HDMI, D-Sub->DVI Adapter, Optimus e-Sport PC, Iiyama G-Master
    Such cheap on the Allegro work surprisingly as they are supposed to work. There is no guarantee.
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  • #5 17312862
    badboy84
    Level 43  
    Posts: 8749
    Help: 1197
    Rate: 1483
    Does this monitor have a DVI connector? Please provide the exact model.
  • #6 17312868
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    there is no mister. Samsung SA300 monitor has 2 inputs. 1. power 2. VGA DSUB. purchased converter, I will write as podepne :)
  • #7 17321685
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    and I bought: HDMI to VGA ADAPTER DSUB FULL HD cable
    I plug it in and it does not work. restarting the computer does nothing. the computer cannot detect the second screen.
    I have two questions.
    1.Why is it not working?
    2. Why do I need additional HDMI and VGA inputs on the back of the computer if the monitor is to be connected to the graphics card?

    best regards
  • #8 17321856
    badboy84
    Level 43  
    Posts: 8749
    Help: 1197
    Rate: 1483
    Therefore, it does not work if the monitor is analog and the graphics card has digital outputs, it can work when the monitor is digital but also has analog inputs.

    The inputs on the motherboard allow you to use the graphics chip built into the processor when you do not have a dedicated graphics card. You can use such a system if the computer is used mainly for multimedia such as movies or YouTube and other applications that do not require high computing power. It is also possible to play from poverty, but it is rather art for the sake of art.
  • #9 17321938
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    in short, the monitor can be thrown into the trash?
  • #10 17322073
    badboy84
    Level 43  
    Posts: 8749
    Help: 1197
    Rate: 1483
    If it is operational, why? I just think that it will not work in such a combination. Maybe with a different adapter, but maybe with a big question mark.
  • #11 17323738
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    it sounds a little paranoid. after all, it is not any advanced technology. in addition, the computer has more ports than such a laptop and, paradoxically, there were no problems with this on the laptop. I am also not going to buy thousands of adapters blind in the hope that one of them will "goof". what to follow? by what parameters?
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  • #12 17323911
    radius75
    Level 21  
    Posts: 391
    Help: 31
    Rate: 18
    after connecting both monitors what do you see in this tab?

    Example:
    Spoiler:
    Computer Not Detecting Samsung SA300: HDMI, D-Sub->DVI Adapter, Optimus e-Sport PC, Iiyama G-Master


    BTW I am comp. stationary, it does not matter if I plug into the DVI slot of the graphics card or the VGA card on the motherboard. I always have an image on the monitor or TV (the question of whether it is the basic or extended desktop is then set in the graphics card options).

    Is the Samsung SA300 monitor functional, have you tested it on a different computer?
    Is the VGA output on the motherboard OK?
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  • #13 17325755
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    for me it does not detect the second monitor. when connected to the card adapter it is black and the power indicator is on. when I connect it to VGA, the first monitor goes out.
    The Samsung monitor (VGA) works because there is no problem to connect it to the laptop. does the computer's VGA input work? the computer is 2-3 months old. is new. Computer Not Detecting Samsung SA300: HDMI, D-Sub->DVI Adapter, Optimus e-Sport PC, Iiyama G-Master
  • #14 17325794
    radius75
    Level 21  
    Posts: 391
    Help: 31
    Rate: 18
    Check it out

    -If all drivers in the manager are properly installed.
    -Is there any option in Bios sometimes blocking
    -Problem in system error.

    Do you have the option to run a Linux system from a flash drive? To eliminate it is a windows error.
  • #15 17329169
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    ad1. depends on what drivers you ask. the computer is 3 months old and the connection of the 2nd monitor has not worked for 3 months. and then the drivers were up-to-date
    ad2. I have no idea. I don't know much about bios, I don't even know how to look for anything there
    ad3. I don't know what mistake you are asking about. this is win10, he has a problem all the time
    ad4. I have no such possibility
  • #16 17329323
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    WN422G wrote:
    why do I need extra w y HDMI and VGA inputs on the back of the computer if the monitor is to be connected to the graphics card?

    Because you have integrated graphics on the board.
    WN422G wrote:
    when I connect it to VGA, the first monitor goes out.

    Probably in the BIOS you need to set the parallel operation of integrated graphics and on the card, if it has such an option.
    WN422G wrote:
    ad2. I have no idea , I don't know myself on bios, even I do not know how to look for anything there

    Just read the manual for the CD.
    WN422G wrote:
    ad4. I have no such possibility

    Due to?


    So to sum up, Ad5:
    Go to the site , since you cannot perform basic diagnostics. Nobody will do it for you remotely.
  • #17 17332947
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    since connecting an ordinary analog monitor to the computer causes problems where you need to intervene in the BIOS; /
    unless computers are specially designed to replace old (working) monitors from the market and replace them with digital ones; /

    I know I have an integrated card. the conclusion is that by default I only have an additional card set to work and the integrated one is not used at all. I used to set the cards in the BIOS to run as needed, but on the laptop.
  • #18 17332959
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    WN422G wrote:
    unless computers are specially designed to replace old ones from the market

    Ask the manufacturers these questions :lol:

    WN422G wrote:
    since connecting an ordinary analog monitor to a computer is problematic

    As you can see you have problems with it and that's why the topic ended up in the beginners section.
    If you are not familiar with the basic configuration of computers and BIOS settings, as well as are not able to use the manual for their own equipment, I recommend visiting the service. This also applies to those who are unable to benefit from the advice given.
  • #19 17336306
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    I have problems with my eyesight. since the PC box is in a moderately accessible place, I didn't take a good look at the back. and today it is enlightenment. the HDMI input is on the tab one and is occupied by the monitor. the second HDMI is probably on the integrated card. but the card has 3 Display Port inputs. so I bought the wrong adapter. curtain.
  • #20 17382600
    WN422G
    Level 9  
    Posts: 78
    Rate: 19
    WELCOME BACK
    I bought a DisplayPort-> VGA adapter, I plug it in and it works :D
    but..
    firstly, on the second screen (Samsung) the image is blurry and blurry, but when I open the menu, the colors and sharpness are fine.
    Not only that, in the screen options it is true that I am identified by the 1st and 2nd monitor, but it does not detect any. why is it not as simple as in a decent win7; /
    ps the corks popped out twice.
    ps2 in the card settings, both monitors are visible, but it is not possible to set the Samsung monitor to be the second screen.
  • #21 17382802
    Robert B
    Level 43  
    Posts: 22594
    Help: 2027
    Rate: 1412
    WN422G wrote:
    twice to me traffic jams fired

    The corks are in the bottles. There are devices and installations fuses . Ask your power supply for the reason.
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Topic summary

✨ The discussion revolves around a user experiencing issues with connecting a Samsung SA300 monitor to an Optimus e-sport extreme desktop computer. The user successfully connected an Iiyama G-Master monitor via HDMI to the graphics card but faced difficulties when attempting to connect the Samsung monitor using a D-Sub to DVI adapter. Responses highlight the importance of ensuring compatibility between analog and digital connections, suggesting the use of an HDMI to D-Sub converter. The user later discovered that the HDMI input was occupied and that the graphics card had multiple DisplayPort outputs, leading to confusion regarding the correct adapter. Ultimately, a DisplayPort to VGA adapter was purchased, but the Samsung monitor displayed a blurry image, indicating potential resolution or configuration issues. The conversation also touched on BIOS settings and the need for proper driver installation.
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FAQ

TL;DR: A DisplayPort→VGA adapter solved it ("I plug it in and it works") and 2 power trips were noted; expect possible blur and check Windows display settings. This FAQ is for GTX 1070 owners connecting VGA‑only Samsung SA300 monitors. [Elektroda, WN422G, post #17382600]

Why it matters: It shows the exact adapter and settings path that actually makes a VGA‑only screen work with a modern GPU.

Quick Facts

  • In this case, the GTX 1070 had three DisplayPort outputs; the motherboard HDMI belonged to the iGPU. [Elektroda, WN422G, post #17336306]
  • A DP→VGA adapter successfully brought the Samsung SA300 online, though blur and detection quirks appeared. [Elektroda, WN422G, post #17382600]
  • DVI‑D/HDMI are digital‑only; passive DVI/HDMI→VGA dongles won’t work on such outputs. [Why does my DVI to VGA adapter not work?]
  • Typical active DP→VGA adapters support up to 1920×1080 at 60 Hz. [StarTech DP to VGA Adapter]
  • Running motherboard video alongside a GPU may require enabling parallel iGPU in BIOS. [Elektroda, Robert B, post #17329323]

Why won’t my Samsung SA300 (VGA only) show an image from a GTX 1070 using a DVI/HDMI adapter?

Because the card outputs digital signals and VGA is analog. Passive DVI/HDMI→VGA adapters cannot convert the signal. You need an active converter or use a DisplayPort→VGA adapter that performs digital‑to‑analog conversion. That is why passive DVI‑to‑VGA pigtails fail on modern GPUs. [Why does my DVI to VGA adapter not work?]

What actually worked here to connect the Samsung SA300?

A DisplayPort→VGA adapter from the GTX 1070 to the Samsung SA300. The user reported, “I plug it in and it works,” though image blur and Windows detection quirks followed. This confirms the GPU’s DP port plus a DP→VGA adapter is a viable path. [Elektroda, WN422G, post #17382600]

My HDMI‑to‑VGA adapter doesn’t work. Why?

Many inexpensive HDMI→VGA devices are unreliable or not truly active. Without proper active conversion, the monitor won’t be detected. As one helper put it, “There is no guarantee.” Try a known good active adapter or switch to DP→VGA. [Elektroda, 310artur, post #17312860]

Should I use the motherboard video ports or the GTX 1070’s ports?

Use the graphics card ports for displays. In this thread, HDMI on the GPU produced an image while the motherboard port did not. Motherboard ports are tied to the CPU’s integrated graphics and may be disabled or need BIOS changes. [Elektroda, WN422G, post #17312400]

Can I run the integrated graphics and the GTX 1070 together?

Sometimes, if the BIOS supports it. Enable the setting for parallel operation or iGPU multi‑monitor. As one expert noted, “set the parallel operation of integrated graphics and on the card.” Then configure displays in Windows or the NVIDIA panel. [Elektroda, Robert B, post #17329323]

Windows 10 says it can’t detect a second display. What should I try?

Confirm the adapter is active and the cable is good. Reinstall or update the NVIDIA driver, then set Multiple displays in NVIDIA Control Panel. To rule out a Windows issue, boot a Linux Live USB and check detection there. [Elektroda, radius75, post #17325794]

The VGA image is blurry over the adapter. How do I fix it?

Set the monitor to its native resolution and 60 Hz. Use the monitor’s Auto/Clock/Phase or Sharpness controls. Replace long or poor‑quality VGA cables with a shorter, shielded one. Analog VGA can soften edges and pick up noise, especially at 1080p. [VGA connector]

Will a passive DVI‑to‑VGA dongle ever work on this GPU?

No. The GTX 1070’s DVI is DVI‑D, which carries only digital signals. Passive adapters cannot convert to analog. Use an active DVI/HDMI→VGA converter or, better, a DP→VGA adapter from the card’s DisplayPort. [Why does my DVI to VGA adapter not work?]

Are cheap DP/HDMI‑to‑VGA adapters reliable?

Results vary. Some low‑cost active converters work, but others fail or are unstable. As a contributor warned, “There is no guarantee.” If stability matters, pick a reputable active adapter and keep cables short and secure. [Elektroda, 310artur, post #17312860]

When I plug into the motherboard VGA, my main monitor goes black. Why?

Connecting a display to the motherboard can shift output to the iGPU. If iGPU multi‑monitor is not enabled, the discrete card’s output may drop. Enable parallel operation for iGPU plus GPU in BIOS, then reconfigure displays. [Elektroda, Robert B, post #17329323]

How do I connect the Samsung SA300 to a GTX 1070 in three steps?

  1. Plug a DP→VGA adapter into one of the GTX 1070’s DisplayPort outputs.
  2. Connect a VGA cable from the adapter to the Samsung SA300.
  3. In NVIDIA Control Panel, set Multiple displays and choose Extend. [Elektroda, WN422G, post #17382600]

My power “tripped” while connecting the adapter. What should I check?

Repeated tripping suggests a power or wiring issue. Inspect the PC power supply and the outlet circuit. Avoid daisy‑chained strips. As one expert quipped, fuses are the devices that trip; investigate the PSU as a first step. [Elektroda, Robert B, post #17382802]

What resolution can these DP→VGA adapters handle?

Typical active DisplayPort→VGA adapters support up to 1920×1080 at 60 Hz. Some models reach 1920×1200. Check your adapter’s spec and set the monitor to native resolution for best sharpness. [StarTech DP to VGA Adapter]

Which GTX 1070 port should I use for the VGA adapter?

Use a DisplayPort on the GTX 1070 with a DP→VGA adapter. In this case, the card exposed three DP outputs, which enabled a working connection to the SA300. [Elektroda, WN422G, post #17336306]
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