You require a computer with a minimum ,
- 64-bit Windows 7 or higher
- Intel® Core™ i7 – 6900 or higher
- 6th Generation or higher
- 32GB RAM or higher
- 8GB Nvidia Graphic or Higher
- HDD 500GB or higher
- if you require to control Access ! you require PLC ( Programable Logic Controller )
the information above can operate up to 5 IP cameras . if you intended to connect more cameras you will require higher GPU and you may require higher RAM