Skip ECC RAM for your pfSense build.

type: .report. source_topic: pfSense & firewalls

You can skip it.

pfSense is a firewall, not a database or a render farm. It’s not chewing through terabytes of memory corrections. On an AMD G-series board that supports ECC, you’ll pay a premium for the RAM and the motherboard, and in return you get peace of mind that’s almost certainly unnecessary for a home or small office router.

Memory errors on pfSense are incredibly rare in practice. If a bit flips, worst case is a packet gets corrupted or a rule lookup glitches — the system will recover on the next packet. For 99.9% of users, the money is better spent on a higher-quality NIC or a beefier CPU (if you’re running VPNs or IDS). ECC helps when you’re running something that absolutely cannot tolerate a corrupted calculation, like ZFS pools in a file server, or a hypervisor hosting critical VMs. pfSense isn’t either of those.

If you already have an ECC board and sticks, great, use them. But don’t go out of your way to buy them for this build. Your firewall will be fine with standard DDR3 or DDR4.

You’re better off buying a proper Intel NIC than paying the ECC tax.