If you see the CPU and Memory red and maxed out while trying to see live view, follow the steps below.
Log into NVMS.
Click on Edit Common Function. (If you have this function already, skip to the next step)
Select Local Configuration and click OK.
Click on Local Setting.
Under Decoding Mode, select Soft Decoding and click Apply.
At the top, select Overload Setting.
Select max CPU and Memory.
Close NVMS and don't save live view settings.
Restart NVMS. The changes made will help lower overloading. If it's still maxing out and struggling to stream live view, consider changing the stream to sub stream, lowering the resolution on the cameras and not using any other applications in the background.