Pros: - Great price. - Small and at the same time easy to work. - You can rock 128Gb of memory. - Supports ECC unbuffered. - i7 12th gen runs fine.

Cons: - No support for RDIMMs. - I managed to install 140mm fan thinking the more airflow the better. But that compromises what you can install in the PCIe slot. A network card will fit, but definitely not a GPU, not even if it has the smallest profile. (unless the fan is removed) - For the B660 there are 3 SATA ports in the motherboard, but only 2 cables in the box, and PSU only has 2 connectors. (plan ahead if you are going to use all 3 SATA Ports)

Overall Review: Even though I found downsides because of the small form factor, I knew what I was getting into, so I can let that go. This seems to be a good low-cost gaming machine, but if you are looking for a homelab server, unless you are looking for something in the used market, you are not going to find anything better than this, at this price. I ended up not using ECC. Not a best practice, but also not the end of the world if backups are properly made. VMs with ESXi run like a knife in butter.