@jaycanter
Are you by chance using the "Limit decoding unless required" feature in Blue Iris on all or some of your cameras? It has a drastic effect on lowering CPU usage, but the setting can only do its magic for cameras that are not being viewed though the web server (in a mobile app or web client). So if you are using that setting, then the answer to your problem is easy, you've overloaded your Blue Iris PC and need either a hardware upgrade or a pass at optimizing the Blue Iris and camera settings.
Yes i have to use "Limit decoding unless required" I have 20+ cameras and all are Dahua so all the dome cams i can't set the fps. I set them to 15 in the camera but there stuck at 30 with BI.
If i turn off "Limit decoding unless required" on the cams i have on cpu goes to 100
That's my problem No matter what you set the Cams for they do 30 fps. Except for the ptz and varifocals.
Here's pic of BI staus page.
No matter what they are set for in the cameras they show 30 8n Bi
There was something about newer being signed so you can't go back