The logic k1114, is really low power consumption. I'm European and here electricity can be expensive. This will run 24/7/365. It will run a hypervisor and most of the VMs will be idling 95% of the time. All the parts need to be low power I'm a professional that needs a home lab, always on. Always.
Gaming below with a 750 watts PSU and all work above with a really low power PC.
Thanks for the tests you are going to do in your I5, it should apply to I3 too.