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Getting 4 monitors working with 2 GEFORCE GT 1030

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vlinder View Drop Down
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    Posted: 01 Jan 2019 at 1:19am
I've just got my first build running Linux 18.3 on an ASRock Taichi X370 with a Ryzen 1700 CPU. I bought 2 GEFORCE GT 1030 GPUs to power 3 or 4 monitors, and mounted them in PCIE2 and PCIE3. Unfortunately, only the HDMI and DVI-D ports on the GPU mounted in PCIE2 work. A friend who works in IT tells me that the 2nd GPU simply adds graphics power to the first one, and that it cannot be used independently. Is there no way that I can power 3 or 4 monitors using these cards? I like the cards' passive cooling, and would like to keep them. Any help in getting both working would be GREATLY appreciated.
Ryzen 7 1700; ASRock Taichi X370; Corsair 3100Mhz; Samsung 970EVO 500GB; 2x GEFORCE GT 1030; Linux Mint 18.3 (Sylvia)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PetrolHead Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jan 2019 at 12:12pm
The GT 1030 does not officially support SLI (although apparently there's a hack that can enable it), and multi-gpu support is poor in general, so you can pretty much forget about boosting performance with the 2nd GT 1030. Based on some forum posts I came across you should, however, be able to use more monitors. Does the system find both GPUs if you use lshw, for example?

P.S. You didn't specify which Linux flavour you're using, but whichever it is, you should probably ask about this also in the distro's community forums, as it may be a driver or Linux kernel related issue.
Ryzen 5 1500X, ASRock AB350M Pro4, 2x8 GB G.Skill Trident Z 3466CL16, Sapphire Pulse RX Vega56 8G HBM2, Corsair RM550x, Samsung 960 EVO SSD (NVMe) 250GB, Samsung 850 EVO SSD 500 GB, Windows 10 64-bit
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Post Options Post Options   Thanks (0) Thanks(0)   Quote vlinder Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2019 at 6:42am
Thanks for your response. My Linux flavor is Mint 18.3 (Cinnamon-Sylvia). As best I can tell, running lshw only gives me information about the ASRock motherboard. Running "inxi -Fxzr" from the terminal does indicate that the Linux OS finds the two GPUs, however. Here is the relevant section of the output:
Graphics:     Card-1: NVIDIA Device 1d01 bus-ID: 2d:00.0
     Card-2: NVIDIA Device 1d01 bus-ID: 2e:00.0
     Display Server: X.Org 1.18.4 drivers: nvidia,nouveau (unloaded: fbdev,vesa)
     Resolution: 1920x1080@60.00hz, 1920x1080@60.00hz
     GLX Renderer: GeForce GT 1030/PCIe/SSE2
     GLX Version: 4.5.0 NVIDIA 384.130 Direct Rendering: Yes
I'm happy to post my question in another forum. Yet is there more assistance that I might receive here before I move on? Any help would be greatly appreciated.
Ryzen 7 1700; ASRock Taichi X370; Corsair 3100Mhz; Samsung 970EVO 500GB; 2x GEFORCE GT 1030; Linux Mint 18.3 (Sylvia)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DyraSan Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2019 at 2:18pm
I was trying to connect dual monitor but cant succeed. so I giveup. so I am trying to get a cheap gaming PC with a GT 1030 but i need to know if i upgrade using 2 1030. what will be the effects?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PetrolHead Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2019 at 6:18pm
The biggest effect of using two GT 1030s is less money in your wallet. As I said in my previous post, SLI is not officially supported and even if it was, SLI is a poorer option than getting a GTX 1050 or an RX 560 (which should cost about the same as two GT 1030s). Then there's also the fact that NVidia sells the GT 1030 with GDDR5 memory and DDR4 memory and the DDR4 version has roughly half the performance of the GDDR5 version, so you really have to be careful when buying a GT 1030 in the first place.
Ryzen 5 1500X, ASRock AB350M Pro4, 2x8 GB G.Skill Trident Z 3466CL16, Sapphire Pulse RX Vega56 8G HBM2, Corsair RM550x, Samsung 960 EVO SSD (NVMe) 250GB, Samsung 850 EVO SSD 500 GB, Windows 10 64-bit
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PetrolHead Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2019 at 6:38pm
vlinder, there's not much more I can help you with, as I've no experience with your use case. I did find this Stack Overflow thread that could be of some help:

[URL=https://stackoverflow.com/questions/49621498/dual-gpu-configuration-on-ubuntu-16-04]https://stackoverflow.com/questions/49621498/dual-gpu-configuration-on-ubuntu-16-04[/URL]

Ubuntu and Mint are so closely related that I doubt that's an issue, but the big difference between the thread and your use case is that GTX 970 supports SLI.
Ryzen 5 1500X, ASRock AB350M Pro4, 2x8 GB G.Skill Trident Z 3466CL16, Sapphire Pulse RX Vega56 8G HBM2, Corsair RM550x, Samsung 960 EVO SSD (NVMe) 250GB, Samsung 850 EVO SSD 500 GB, Windows 10 64-bit
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Post Options Post Options   Thanks (0) Thanks(0)   Quote vlinder Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jan 2019 at 12:48am
Actually you have been VERY helpful, PetrolHead. The key question in my post was whether or not my difficulty in getting 2 monitors working was a hardware issue. Your initial suggestion was that it was more likely a driver problem. Running "inxi -Fxzr" demonstrated that the hardware (as well as Mint 18.3) recognized both GT 1030 GPUs. Today I was able to confirm that getting multiple monitors working on the two GPUs can (in principle) be done via modifications in xorg.conf--my NVIDIA driver?ôs configuration file. The NVIDIA driver (version 384.130) that came with my 18.3 installation provides a GUI called, ?úNVIDIA X Server Settings?? Using it with 3 monitors powered up, I did the following:

Click on "X Server Display Configuration"
Note that Display 3 is "(Disabled)"
Select the disabled display by clicking on it.
In the drop-down menu to the right of "Configuration:" select "New X Screen (requires X restart)"
Save changes as /etc/X11/xorg.conf

Now comes the part where my ?úin principle??hedge comes in:

Upon rebooting the system, Cinnamon (i.e., Mint 18.3) crashed. Continuing despite the crash, cursor movements were (for the first time) being displayed on my 3rd monitor. That's the good news. The bad news is that the crash left Mint?ôs panel no longer functioning (and more problems that I did not bother to explore). Renaming xorg.conf restored the computer?ôs previous functioning, leaving me to conclude that it is possible to get 4 GT 1030s running on Mint 18.3 installed on an ASRock Taichi X370. My first step in that direction will be updating my NVIDIA driver (www.nvidia.com/Download/index.aspx?lang=en-us).

By the way, I agree with you that two GT 1030s do not provide much performance-for-the-buck. But they?ôre silent (no fan), which was the appeal for me. Besides, I?ôve already bought them and (fortunately) they are both the GDDR5 version. When I work out a way to get them both driving more than 2 monitors (without crashing the OS), I?ôll post it on forums.geforce.com.

Thanks again for sticking with me on this!
Ryzen 7 1700; ASRock Taichi X370; Corsair 3100Mhz; Samsung 970EVO 500GB; 2x GEFORCE GT 1030; Linux Mint 18.3 (Sylvia)
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Post Options Post Options   Thanks (1) Thanks(1)   Quote PetrolHead Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2019 at 5:29am
No problem! Glad to hear what little I had to share was useful. :) I hope by now you've been able to get your system up and running with four monitors. If not, here's one final shot in the dark: Try Ubuntu Gnome with a bootable USB stick. A few years ago I had some trouble with Mint when upgrading my GPU from a GTX 650 to a GTX 1060. I quickly got tired of trying to figure out why Mint refused to work properly with the new GPU and installed Ubuntu Budgie instead. While Budgie was a frustrating experience in other ways, it had no issues with the GTX 1060.
Ryzen 5 1500X, ASRock AB350M Pro4, 2x8 GB G.Skill Trident Z 3466CL16, Sapphire Pulse RX Vega56 8G HBM2, Corsair RM550x, Samsung 960 EVO SSD (NVMe) 250GB, Samsung 850 EVO SSD 500 GB, Windows 10 64-bit
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