So, I am also playing around with this. I have 6 x 4K cams with a NVR. Ideally, i would like to pull the feed off of the NVR rather than the cams but not getting a whole lot of traction there.
I did install Blue Iris and it seems that the cams will work with BI but noticing quite a bit of CPU activity when doing this.
For the CPU, I have a I7-3770 which is not new but should still be quite powerful. With it and one camera I see about 12-25% CPU activity. I have not had the opportunity to connect all six cameras, but think that the CPU will not be powerful enough if I extrapolate for all six to eight cameras. Not sure if the CPU usuage will be linear.
The less screwing around I have to do with Blue IRis, the more I can focus on writing a interface to myServer.
What experience do you have with BI? What is your configuration?