Multiple Gpus

[Velkien]

Hello, sorry I do not speak English, so I had to use google translate.
I work with events and the companies that I work with do multiple projections. I'm wanna start working with this since I have a Gamer PC with this configuration:
Corei i7 7700K
Asrcok Z270 Gaming 4K Motherboard with 2 PCI-E
16gb DDR4
240GB SSD
GTX 1070 8GB
1000W Source
My doubts are as follows:
With this video card I know I can use 4 projectors besides the monitor where the Resolume UI will be. If I use an MST HUB, can I use more outputs besides these or does Nvidia limit the 4 anyway?
If that does not work I can use 2 Video Cards to give me more outputs?
Can I use different brand video cards? For example I work with a company that uses the dataout watchout with a GPRO 6200, and runs quietly, but I read that the Resolume behaves differently with this type of board because of its poor processing power. I would like to know if I have to use my GTX 1070 in addition to Gpro to have more outputs, in the case 9 outputs, or the GTX 1070 to manage Resolume and Gpro to manage the outputs?
Thank you guys!

[He2neg]

You will find some information here:

https://resolume.com/manual/_media/en/r ... upport.pdf

[Oaktown]

With this video card I know I can use 4 projectors besides the monitor where the Resolume UI will be.

4 total including the UI.

If I use an MST HUB, can I use more outputs besides these or does Nvidia limit the 4 anyway?

Still 4 total including the UI.

If that does not work I can use 2 Video Cards to give me more outputs?

Yes

Can I use different brand video cards?

Not recommended unless you're using different brands of the same GPU.

[Velkien]

Many thanks friends for the answers, they helped me a lot. Thank you