It turns out that the only problem with my wiring was the heads. I couldn’t use my custom wiring schema for Gigabit Ethernet purposes. I changed the wiring for my Gigabit connections to the TIA/EIA 568B standard. Now the only limitation on my Gigabit speed is the processor and bus speed of my GX240 Optiplex. I’m pulling 170 – 200Mbps out of the thing to my Debian based file server. You might find the following wiring diagrams helpful: