Help with 2 GPU setup non-SLI

[jesseo2003]

I need some help with my setup I have 2 GPU's and I want one to be dedicated for the OS and applications and the other for solving complex mathematical computations. The problem is windows is automatically using the one I want for calculating said computations as the default and the other GPU is just sitting idle. Both are nvidia. Does windows or nvidia automatically assign the higher tier GPU as the main GPU for OS/Applications because it seems that is the case for me at least. Thanks!

[Electronics Wizardy]

what is your system specs?

 

What gpus?

 

are you using cuda?

 

Normally having a desktop gpu and a cuda gpu won't affect performance at all as just using the desktop using almost no gpu power.

[jesseo2003]

Ryzen 1800X 16GB RAM 1080Ti(computing gpu) and GT1030 (one I want to use for OS/applications). Yes, cuda is enabled only on the computing GPU. The problem is I also want to do very light gaming on the GT 1030 but it ends up using the remaining juice from the 1080ti and the gt 1030 sits idle

 

[Likwid]

5 minutes ago, jesseo2003 said:

Ryzen 1800X 16GB RAM 1080Ti(computing gpu) and GT1030 (one I want to use for OS/applications). Yes, cuda is enabled only on the computing GPU. The problem is I also want to do very light gaming on the GT 1030 but it ends up using the remaining juice from the 1080ti and the gt 1030 sits idle

 

Have you plugged monitor cable in gt 1030?

[jesseo2003]

Just now, Likwid said:

Have you plugged monitor cable in gt 1030?

Yes, I also have a triple monitor setup 2 monitors are plugged into the gt1030 and 1 into the 1080ti. Could this be the problem? I have my main display plugged into the 1080ti.

[pyrojoe34]

You should be able to set in the BIOS which PCIe slot is the primary video output. You should also go into the nvidia control panel and select "Manage 3D settings". Under "Global Settings" select the GT1030 as the "preferred graphics processor". Under program settings you can specifically select which programs use the 1080Ti.

[Likwid]

2 minutes ago, jesseo2003 said:

Yes, I also have a triple monitor setup 2 monitors are plugged into the gt1030 and 1 into the 1080ti. Could this be the problem? I have my main display plugged into the 1080ti.

Plug your main one in 1030 and you shouldn't have any more problems

[N van Sabben]

2 minutes ago, jesseo2003 said:

Yes, I also have a triple monitor setup 2 monitors are plugged into the gt1030 and 1 into the 1080ti. Could this be the problem? I have my main display plugged into the 1080ti.

It could be the problem, have u tried unplugging the main monitor form the 1080ti?

[pyrojoe34]

1 minute ago, jesseo2003 said:

Yes, I also have a triple monitor setup 2 monitors are plugged into the gt1030 and 1 into the 1080ti. Could this be the problem? I have my main display plugged into the 1080ti.

Yes, if the main display is on the 1080Ti it will use that to drive games set on the primary display. You should have your primary monitor plugged into the 1030 if you don't want the 1080Ti to be used for games running on the primary display.

[jesseo2003]

Just now, pyrojoe34 said:

You should be able to set in the BIOS which PCIe slot is the primary video output. You should also go into the nvidia control panel and select "Manage 3D settings". Under "Global Settings" select the GT1030 as the "preferred graphics processor". Under program settings you can specifically select which programs use the 1080Ti.

I checked my settings in the nvidia panel and it doesn't have the option for preferred graphics processor. I have tried using the option under program settings as well and didn't seem to work either. I guess I can try to look into the bios. Its a new build and I'm not too familiar with the settings on the BIOS yet but I can try playing around and see what I find.

[jesseo2003]

Just now, N van Sabben said:

It could be the problem, have u tried unplugging the main monitor form the 1080ti?

Just looked and now i see why i have my main plugged into the 1080ti. The gt1030 doesn't have a display port. Only DVI and hdmi. Main monitor is display port

[pyrojoe34]

4 minutes ago, jesseo2003 said:

I checked my settings in the nvidia panel and it doesn't have the option for preferred graphics processor. I have tried using the option under program settings as well and didn't seem to work either. I guess I can try to look into the bios. Its a new build and I'm not too familiar with the settings on the BIOS yet but I can try playing around and see what I find.

You don't see this? Weird

Spoiler

 

Anyway, switching the primary monitor should also work fine.

[pyrojoe34]

2 minutes ago, jesseo2003 said:

Just looked and now i see why i have my main plugged into the 1080ti. The gt1030 doesn't have a display port. Only DVI and hdmi. Main monitor is display port

Well then you should either set a different monitor as the primary or run the games off a secondary monitor. You could also get an HDMI to DP adapter.

[jesseo2003]

3 minutes ago, pyrojoe34 said:

Well then you should either set a different monitor as the primary or run the games off a secondary monitor. You could also get an HDMI to DP adapter.

It appears in order to wake the other GPU I had to run the game full screen on the monitor its plugged into. This seems to work.