pfSense firewall in a compact mini-itx form factor using many recycled parts. Purchased new for this build were the ribbon cable for the quad NIC, the case, the heatsink and the mSATA hard drive. More than powerful enough for a home firewall.
Using an i5 3475S CPU and modded case to allow fitting in the Intel QuadNIC Had an additional 4GB stick of memory so it's running on 12GB
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The Noctua fan was in the perfect spot to mount a corner of the Intel card on to keep it in place