appropriate hardware

[zd59]

Hi!

Currently my testing ZM install HW is.
Old notebook with i5-3210M & 8GB RAM, and 2TB USB3 5400RPM disk.
Two 3MP cameras at 10 FPS.
Debian + ZM-1.30
I am planing to move server to new machine and add two 3MP cameras.

Would it be appropriate to buy GB-BKi3A-7100 with i3-7100 and 8 GB RAM?

The CPUs above are arround the same capability.
I append Monitorix data for a day, to show a current load, to ease evaluation. The attacment is PDF. Please remove .txt extension before opening.

And a question: You can see quad rise of a network trafic over the night mode. That is Tiandy 4MP camera with IR LEDs set to send 3MP photos (h.264).
4MP stream did not worked, to many "stream lost" alarms. The only way to receive that stream is ffmpeg RTP/RTSP option in monitor settings and 32 color.
ZM do not have an option to switch to grey scale over night mode.
Why the grey scale video stream is 4 times larger?