Okay so thanks to this site i have a very decent setup running a dell optiplex 3020 8gb ddr3 intel i5 at 3.2ghz and an ssd 250 with wd 4tb purple as storage. im running 15 dahua cameras and the system is stable when viewing from the PC nvr. that took alot of work cpu is 40-75%. my proplem is if i open the ios app on my phone cpu ram and hdd spike to 100% and the pc crashes. Is their a setting im missing? when i access the nvr on another computer it does the same thing.