When I set up each camera for deepstack, do I need to select motion detection in the BI camera setup page?

Did you run the command line instruction:

deep stack —VISION-DETECTION=True —PORT=5000

I just upgraded from an i7 4th gen to a 6th gen i7. Both with 16gigs of ram. I saw 40-60% CPU usage to 20-35% on the newer one. I have 9 cameras, several 4k, the rest are 1080. I paid $269 for the used Dell Optiplex 7050 on eBay so you don't have to spend a fortune on a system.