The Xeon E3-1265L v3 is good if you want a low power (the L letter) and low cost Xeon. Usually more "upscale" Xeon are more expensive.
It can be had from Aliexpress at around 65 Euros, while a E3-1275 v3 is around 120 Euros, and a E3-1285 v3 goes for around 130 Euros.
More details here:
List of Haswell Xeon Processors
List of Intel Haswell-based Xeon microprocessors - Wikipedia
The idea is to get more cpu resources with a low(er) power consumption because the pc will work as server/router with some service in my home network.
I plan to install Debian with Home Assistant, Zabbix, Mqtt, PiHole, Heimdall, Wireguard and some other service but the network is really small and I'm fairly sure that the services will not stress the cpu.
Actually I'm using a pi4 but is a pain to install a vanilla Debian on it with the boot from ssd so, having received this pc for free, I thought to spice it up a little.
Thank for the info