Any way to span displays across two GPUs?

[BondiBlue]

I just purchased two more 27" iMacs to use as monitors for my PC, and when combined with my existing 27" iMac I'd love to run them in a 3-wide setup at 7680x1440. My primary GPU is a GTX 1660 Ti 6GB, and unfortunately I can't run all these iMacs from that card. The card has 1x DisplayPort, 1x DVI, and 1x HDMI. The iMacs need to connect through DisplayPort, and they'll also work with HDMI by using an active adapter. That allows two displays to be connected, but not all three at once. 

 

I also have a 4GB Radeon RX 570 in my system. It has 3x DisplayPort, 1x HDMI, and 1x DVI. Given the fact it has three DisplayPort connections I'd be able to run all three iMacs from that card no problem, but it's not as powerful as the 1660 Ti, and it can only barely manage Ultra settings at 2560x1440 in FH4. I imagine I'd have to lower the settings quite a lot to get that card to run FH4 at 7680x1440. 

 

So, is there any way to span the game across three displays while two of them are connected to a separate card? If possible I'd like to run the game on the 1660 Ti and output to two of the displays through the RX 570, but I have a feeling that it won't be possible. 

 

Individual display specs:

Resolution: 2560x1440

Native refresh rate: 60Hz

OC refresh rate: 66Hz/67Hz (depends on the GPU)

[jaslion]

Can you do it? Yeah sure totally. But it's going to be a PAIN to get going since you'll have a amd and nvidia driver running. Once you get that running stable you can totally do what you want.

[BondiBlue]

4 minutes ago, jaslion said:

Can you do it? Yeah sure totally. But it's going to be a PAIN to get going since you'll have a amd and nvidia driver running. Once you get that running stable you can totally do what you want.

I already have both GPUs running in the system, and they're working perfectly fine on their own. 

[jaslion]

34 minutes ago, BondiBlue said:

I already have both GPUs running in the system, and they're working perfectly fine on their own. 

Ooh I misunderstood the question. Yes you can do it. It's called gpu pass through however it does take a performance hit and I don't think surround gaming works on it. You can try it tho in the nvidia control panel.

 

The 1660ti will also struggle to run at such a resolution of course less so but it will still result in quite lowered settings.