Many here are claiming that 100mb cannot be achieved on just 2 pairs, while in fact that’s all that is required. To prove the point, companies have gotten so cheap that many of the factory made patch cords that come with the low end routers consist of only 2 pair now. Pins1,2 and 3,6 that all folks. Now whether this is good practice is another issue, but as far as throughput is concerned 100mb all the way. Gigabit is another story.