[gothroach]

I use an i3-4370 with 32G of ECC in a Supermicro 4u case as my ZFS NAS - I got it new for the purpose and it's still running strong seven years later. The only changes I've made have been doubling the RAM from 16G, adding in new storage as needed, and adding a dual 10gbit card when I upgraded my network.

I tried a couple of 10gbit cards, but ended up getting a half dozen used Intel X520-DA2 cards for dirt cheap. I've not had any issue with these, and my NAS can easily saturate at least one link. The cards have been reliable in every machine I've tried and can be found for $75-100 - not too bad for dual port 10gbit!

As a side note, I was surprised to find that i3 supports ECC.