Only updated this a while ago, being a router I didn’t need much in the way of power, just reliability. So its mainly made of old parts.

Case:
Generic Desktop ATX (horizontal) ‘modified’ to *erhem* fit the power supply =D.

Case Mod

 

Motherboard:

ASUS M2N SLI Deluxe

CPU:

AMD Sempron 140 2.8GHz (underclocked to 1GHz) 45w Single Core, unlocked to Dual Core with NVIDIA Unleashed mode. Shows as AMD Athlon(tm) II X2 4400e.

HDD:

Western Digital Caviar SE 160GB | SATAII

Western Digital Green 2TB | SATAII

RAM:

2x 1GB Corsair XMS2 DDR2-800

Power Supply:

Vantec ION2 CAN460-C 460W

Graphics Card:

ExpertColor S3 Trio64 86C764X 8MB | PCI

Software Specs:

Its running IPFire, which is actually software based on the first Linux router/firewall distro I ran (IPCop) which was really nice, except it only ran Linux kernel 1.4, which is rather old and lacks many features.