Hi,
The DS-7608NI-K1-4P(B) has a bandwidth of 40Mbps.
Hikvision's 8MP Acusense cameras use around 20-25Mbps.
You would need to look into getting an 8-channel or even a 16-channel NVR so that it could handle the 8MP cameras working at full capacity.
What cameras do you have at the moment and what are you looking to replace them with, please?
Just to point it out – if using Acusense cameras with a K-series NVR, you won’t have the ability to search for footage of only person/vehicle detections directly on the NVR.
E.g. on I-Series NVRs, you can select “human” or “vehicle” in the playback menu, and it will throw up a list of those event periods.
Other than that, the AcuSense cameras still work well on the K-Series NVRs.
We would recommend the
DS-7608NI-I2-8P or the
DS-7616NI-I2-16P because these have a better interface and receive more firmware updates which help with support for the new cameras.
If it's not vital you replace the NVR right at this moment then I would recommend waiting a few months for the new M-series NVR to become available. These have a higher bandwidth than the I-series NVRs so you wouldn't need to consider a 16-channel NVR.