As for me, my LAN is gigabit. I've also tested BI 3 at 300+ FPS total (just to test I turned my cameras up a bit but obviously my network is fine atleast up to that). The way I normal have them set is about 240 FPS total, which BI3 obviously handles fine. With BI 4 though, same setup, I've only ever pulled maybe a total of 130FPS when my cameras are set to be about 240fps. So I plan on either waiting for a version that doesn't do this, doing a factory reset on windows someday when I have time, or contacting Ken and seeing if he'd be willing to remote in and check things out.