[SOLVED] Can you actually use a x1 PCIe slot for video output?

[thoml9]

I put together a little mining rig with a GTX1660S, a GTX 1060 and a RTX 3060. The RTX is on the x16 slot and the other two are connected on x1 slots through riser cables. I can only get video output on the 3060 which is fine if I don't do anything other than mining (hashsrate drops). However, I still gotta use my PC for other stuff. What I wanna know is if it is possible to somehow get video output from one of the GPUs connected on the x1 PCIe slots.

All cards get detected by the OS (Win10)
Motherboard is Asus H87 PLUS
GPU driver is 470.05
Risers VER009s

 

[Lutfij]

Might want to read through this thread;

GPU in a pcie 3.0 x1 slot on monitor output performance

The PCI-E bus is used to communicate with the graphics card. So does this mean that connecting a GPU in a PCI-E 3.0 x1 slot would not affect the monitor output at all ? Is there any impact of the PCI-E bus' bandwidth or throughput on the video output to a monitor?

hardforum.com

 

[thoml9]

Might want to read through this thread;

GPU in a pcie 3.0 x1 slot on monitor output performance

The PCI-E bus is used to communicate with the graphics card. So does this mean that connecting a GPU in a PCI-E 3.0 x1 slot would not affect the monitor output at all ? Is there any impact of the PCI-E bus' bandwidth or throughput on the video output to a monitor?

hardforum.com

Ok, so it should work. Don't know what I'm missing then. I can't get output on either card when they're on the x1 slots but, If they're on the x16 I'm able to get video output.

Have I misunderstood something?

 

[Bassman999]

in 1x you arent getting power from the bus lane now. Im not sure if the pcie cable(s) will still make up for that deficit?

 

[thoml9]

in 1x you arent getting power from the bus lane now. Im not sure if the pcie cable(s) will still make up for that deficit?

Isn't that what the Risers are for? I'm supplying my risers with PCIe cables

 

[Bassman999]

Isn't that what the Risers are for? I'm supplying my risers with PCIe cables

Yeah it should. I was reading another thread and that was mentioned and didnt think of that.

 

[thoml9]

Yeah it should. I was reading another thread and that was mentioned and didnt think of that.

Maybe they're still not getting enough power? I could plug in another PCIe cable or a MOLEX but I'm not sure if this is gonna fry the riser and GPU

 

[Bassman999]

Maybe they're still not getting enough power? I could plug in another PCIe cable or a MOLEX but I'm not sure if this is gonna fry the riser and GPU

Yeah IDK, so dont do this based n my input.

 

[InvalidError]

If the GPUs are working for mining, then I don't see why they wouldn't be working for display output with a monitor attached.

 

[thoml9]

If the GPUs are working for mining, then I don't see why they wouldn't be working for display output with a monitor attached.

I don't see why either. Do I have to change something in the motherboard BIOS? Upgrade it maybe?

 

[InvalidError]

I don't see why either. Do I have to change something in the motherboard BIOS? Upgrade it maybe?

The only GPU settings in BIOS is usually whether you want to prioritize IGP or PCIe for boot-time output and how much system RAM you want to reserve for IGP when enabled. Nothing in there should affect Windows' ability to use the GPUs once booted and if you are already running them for mining, then they are already working as far as Windows and drivers are concerned.

Nvidia does not officially support running GPUs on less than x4, that could be part of your problem.

 

[thoml9]

The only GPU settings in BIOS is usually whether you want to prioritize IGP or PCIe for boot-time output and how much system RAM you want to reserve for IGP when enabled. Nothing in there should affect Windows' ability to use the GPUs once booted and if you are already running them for mining, then they are already working as far as Windows and drivers are concerned.

Nvidia does not officially support running GPUs on less than x4, that could be part of your problem.

I got it to work somehow. I changed one of the risers to the other x16 slot (I think this one runs at x4) and I plugged an HDMI dummy on the RTX. But I got another issue now, for some reason, when I plug the HDMI dummy, windows recognizes that as the main display and splits the screen in two different monitors. I can't open anything because any software opens in the dummy plug. How do I fix this? Should be easy, I think


Edit: never mind, got it to to work. Just have to plug the dummy first and then the actual monitor.