With gigabit, you don’t need to worry about crossover, just connect them with one of your cat6 cables.
via What’s the REAL speed of 1 Gigabit network connection? – Topic Powered by Eve Community.
So actually it turns out (after a little more googling) this is not always true. It depends on the PCs/Devices being connected together. Some support auto-negotiation and others don’t.
Here is the pinout for making a gigabit crossover cable (different than 100 Base-T crossover)
| Pin | Connector #1 | Connector #2 |
| 1 | white/orange | white/green |
| 2 | orange | green |
| 3 | white/green | white/orange |
| 4 | blue | white/brown |
| 5 | white/blue | brown |
| 6 | green | orange |
| 7 | white/brown | blue |
| 8 | brown | white/blue |