4th display isn't working

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dragonbd454151202d2

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Mar 13, 2024
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Hi everyone, I was able to use 4 monitor before but somehow once day it decided to quit and only allow me to use 3 monitor (4th monitor still show in windows connect but say disconnected this display and I can't turn it back up with extended desktop to this display or dupticale to this display). In the nvidia control panel via multi display setup if I click checked the 4th monitor the other one has to go. I am now trying to use igpu and follow the instructions as connect the gpu to mobo via mini displayport and then use the other mini display port to the monitor but the monitor won't even show in setting. In the bios there is no integrated graphic option for me but I find something quite similar to it (BIOS CSM/UEFI Mode) this one basically said that onboard graphic VBIOS is not supported in CSM mode. The "BIOS CSM/UEFI Mode" setting in the BIOS will be changed to "UEFI". So to what my small understanding is it should work? Idk. I have try to reinstall windows but the problem still exists now I have no idea what to do next. To many people has support me, said that I should try turn all monitor setting down to fhd 60hz to see if it is the case but unfortunately it is not.


My spec are Z790 GODLIKE MAX
4090 LIQUID X
I9 14900K
32GB 6100MHZ
 
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1000002204.jpg

Here is what my bios setting look like.
 
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That is strange. Because RTX4090 supports up to 4 displays.
Perhaps the problem is with the adapters you are trying to use.
What are your exact monitors and what cables are you using to connect them?
 
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Nichrome said:
That is strange. Because RTX4090 supports up to 4 displays.
Perhaps the problem is with the adapters you are trying to use.
What are your exact monitors and what cables are you using to connect them?
Click to expand...
I'm using 3 display port and one hdmi cable
My monitor are:
2k 360hz (DP)
Fhd 360hz (DP)
Fhd 240hz (DP)
Fhd 165hz (HDMI)
 
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What are the exact models of those monitors?
And if you flip all those monitors to 1080@60Hz, are you able to use all 4 of them?
 
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Nichrome said:
What are the exact models of those monitors?
And if you flip all those monitors to 1080@60Hz, are you able to use all 4 of them?
Click to expand...
I only remember the brand but not the exact model but the 2k 360hz is asus the fhd 360hz is alienware, the fhd 240hz is asus and the fhd 165hz is samsung.
And no if all monitor is set at fhd 60hz the fourth still won't be use.
 
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