Thank you both for chiming in.
I just did a watt meter test and the DL380p is consuming around 100 watt (CPU usage was less than 5%, so that explains the low power usage), which is about 10% higher watt usage than the desktop 8700K. So power consumption is not an issue for me.
For my intended use (which is Unraid, 10 dockers, and 4 VMs), which would you choose? Server-grade dual e5-2690v2 with 192GB ECC RAM or desktop i7-8700K with 16GB DDR4 RAM?
Or another way of looking at it, should I go with a noisy, robust & stable hardware with high core count and large ECC RAM, OR a consumer-grade quiet machine with faster CPU/RAM, but lower core count and lower RAMs?
At the end of the day, which of the two is the more powerful/optimized machine for Unraid? I know I will never max out the CPU or RAM... I just want to have the better of the two machines for running Unraid.
If you were me, which direction would you go with?