Ok, I must be running into some other issue. I know that the replacement cameras are higher resolution than the existing, but my CPU usage shot up WAY high (ie: I remove 9 720p cameras and added 2 2K cameras and my CPU usage is at like 70% no motion detection, direct to disk where it was at like 23-40% with the 9 720p) there must be an overlay or something on somewhere I'm overlooking that I haven't thought about in ages as I've not had to add cameras in ages.