The 2 inputs of the datapath vision RGB-E2 can be used simultaneously !
I have never used two of this cards in one system, but my guess is that it will work.
Depending on resolution and framerate of the signal you want to capture, there of course might be a performance issue !?
And the more direct show streams you have running at the same time the more likely you will get problems with stuttering video. This seems to be not only to be a performance thing but also a vvvv-timing thing. Setting “wait for frame” correctly most of the time helps … but somehow not always.
I never experienced any overheating problems with the vision RGB-E2.
Markus