trying to run 2 cards in 1 system, not sli

sb5533

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May 3, 2016
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Hello,

I am running an i7 4790k, on an ASUS Z97-A motherboard with a corsair HX850 power supply. This motherboard has 3 pci-e x16 slots on it. Windows 10 64 bit.

Currently i'm running an EVGA GeForce GTX 970 4GB video card. I have 3 32" televisions running at 1080p @ 60Hz that I use for gaming, specifically iRacing, and I am running them in surround mode with a resolution of like 5760x1080.

This video card has 2 HDMI out and 2 display port out, and I have the 3 televisions hooked up to it via 2 HDMI and 1 display port. This means i have an extra display port open.

I run iRacing across all 3 screens, but I am wanting to have a 4th monitor hooked up so I can run a telemetry program and have my teamspeak displaying on that screen.

I bought an EVGA 950GTX 2GB card, because I was wanting to add it as a second video card to my system, and since it's not a 970 like my other card, will not be running it in SLI. I was worried that hooking a 4th monitor up to my main video card would start to cause performance issues, and frame loss, etc.

I tried to place the 2nd video card in the last pci e slot, but since that slot was down at the bottom of the case, it would cause the video card to press up against the power supply, thus one of the cooling fans on the card would be blocked. So, I placed it in the 2nd pci e slot, next to my main card, and seems there is about a 2" to 3" gap between the cards, so i'm thinking cooling shouldnt be an issue.

When I booted up my computer, I loaded up the windows display properties and it showed screen 1 as an extended display, and screen 2 as a separate display. However, when I would load up the nVidia control panel, the first time, it loaded ok. I was able to see the monitors, however, in the box that listed the monitors, it showed my 3 displays under the GTX970 header, and my 4th monitor under the GTX950 header, but the monitor for the GTX950 was not checked, even though there was an image on it. If I tried to click the check box on the 950, it would tell me that in order to do that, I would have to disable surround, and of course, i didnt want to do that.

I am assuming the reason for this is because, in the nvidia control panel, it was showing the display properties for the 3 main monitors, and by trying to check that 4th monitor box, it would no longer be in surround mode.

I assumed that since both cards were the 9x series that I wouldnt need to load any drivers for the 950, as they probably use the same drivers.

What i noticed is that, while I had an expanded display on my main 3 monitors, and a separate image on the 4th monitor, the drop down boxes for adjusting resolution were empty, and if you clicked on them, the drop downs were empty as well.

If I closed out nvidia control panel and tried to re-open it, now there was no menu system in the control panel, only an option for turning on/off stereoscopic 3d, and a page that lists game ratings. Rebooting the computer or changing the display properties in windows wouldnt change this, only thing in nvidia control panel were stereoscopic 3d settings. If I changed the display properties on windows to "display only on 2", the 3 main monitors would shut off and the 4th would be the only one on, and then the nvidia control panel would come back, but as soon as I changed it to "display on 1" or "extend these displays", then the nvidia control panel would go back to just showing only stereoscopic 3d settings.

the only thing i havent tried is installing the 2 video cards, then uninstalling the graphics drivers, then reinstalling the graphics drivers to see if that would perhaps make a difference. As it is now, the system recognizes both video cards, and in the GeForce experience, both graphics cards show up.

What I am wanting to know is, can you run 2 independent video cards under windows 10, so that I can run 3 displays in surround on my GTX 970, then run the second video card on a 4th monitor so i can drag things like teamspeak, telemetry, and possibly a web browser from the main screens to the 4th monitor, so I can use that for things like to see who's talking on teamspeak, as well as allow me to look at telemetry settings so I can analyze and make adjustments without having to alt tab out of the sim to see these things.

Or, do you think that the GTX970 is powerful enough to run the 4th monitor on it, and do the things I am wanting without causing performance issues? If the answer is yes, then, would there be any benefit to trying to set up the 950 as a physx card, if the games I play do not support physx? I.E. is there any performance gain by using a physx card in non physx enabled games, or does the game specifically have to have that functionality in order to get any benefit, such as increased frame rate, or better rendering..etc..

sorry for the long post, just wanted to try and be as clear and concise as I could.

 
In my experience (meaning your mileage may vary) in order to run multiple GPUs in a setup like you are trying to do, they really do need to be in SLI. I've only ever managed to get a picture out of the main card, the second one is essentially off in your setup.
Another option for you is to use the second card as a dedicated PhysX processor, which can be configured from within Nvidia control panel. See this for more info on that: http://www.hardwaresecrets.com/how-to-install-and-configure-a-dedicated-physx-video-card/2/
That option should cut out most FPS drops you may get, especially in PhysX accelerated games.
 


No they don't, SLi is not even needed to run two cards in Surround mode as I have had two 960's on a
Crossfire only motherboard running in Surround mode and I currently have a 970 and 960 running in the same PC so that I can run three monitors and one desktop.
 



i appreciate the responses. I had considered using it as a dedicated physx processor, however, it is my understanding that, using a dedicated physx card in a non physx enabled game wouldn't yield any performance gains. Is this correct? Or will you see some gains, just not as much as if the game was actually physx enabled?

Also, Mousemonkey, I will give that option a go this weekend. Install the card, then remove the graphics driver, and reinstalling them. When I do this, do i need to remove the graphics driver only, or do I need to remove all the nvidia drivers listed in the add/remove program area, including the geforece experience program itself? Or simply just the "nvidia graphics driver" and reinstall using the "clean install" option?

thanks again.
 


I guess times have changed a bit since I attempted this, and as I said mileage may vary. :)
 


I have never used that but I would uninstall it as well just to be on the safe side, you can always reinstall it at a later date.