NVR with POE vs NVR with no POE - Which has better energy efficiency?

[Cossie]

Hello.

1. Have you ever measured the power consumption of a NVR? If I connect 2 IP cams to a NVR, which NVR will have better energy efficiency? NVR power supplies are like computer power supplies I guess and I know computer power supplies hasn't good power effiency. I know Hikvision says the NVRs consumes power lower than 15W for its own computing unit. I know the NVRs with built-in POE has 200W power supply for suppling power to IP cams but can it beat two 12v wall adapters in effiency?

2. Can I hear the fan of a NVR in a silence room? Is built in POE makes any difference in fan noise? I'm planning to have it in my bedroom.

3. I don't know how to ground it. Is non POE version is better choice for me?

Thank you.

 

[tigerwillow1]

From my admittedly limited experience, the fan noise from an NVR is linked with whether or not it has an internal power supply. AFAIK all NVRs with built-in POE have internal power supplies, and are pretty darn loud. Some without POE use a fanless external brick supply (the dahua 5216 is one example), and have a reasonably quiet (not totally silent) case fan. The recommended computers for use with BI tend to also have reasonably quiet fans. Without built-in POE, you need a POE switch. The switches with fans are generally just as bad, noise-wise, as NVRs with built in power supplies. If you can locate the switch somewhere else, its noise might not be an issue.

 

[Cossie]

From my admittedly limited experience, the fan noise from an NVR is linked with whether or not it has an internal power supply. AFAIK all NVRs with built-in POE have internal power supplies, and are pretty darn loud. Some without POE use a fanless external brick supply (the dahua 5216 is one example), and have a reasonably quiet (not totally silent) case fan. The recommended computers for use with BI tend to also have reasonably quiet fans. Without built-in POE, you need a POE switch. The switches with fans are generally just as bad, noise-wise, as NVRs with built in power supplies. If you can locate the switch somewhere else, its noise might not be an issue.

I bought a NVR without POE today. It's so much quieter without the case cover. And I think the fan is dysfunctional without the case cover. Any reason to stop for using it like that?