I have a really good wifi network (ubiquity with WAPs) and I'm getting speeds of 117mb down with 10mb up. I plugged a CAT6 cable in and shut off wifi and my speed goes down to 85-90mb down....is there a 100mb limit with the iMac card? I tried the same thing in my macbook pro and got the same results. I always thought the wired connection was supposed to be faster than wifi? Is there a bottleneck with the iMac and Macbook ethernet devices? Mid 2011 27" iMac 3.4ghz i7 Mid 2012 13" MBP with 2.9Ghz i7 I thought it might be cable loss from the long run of CAT6 but I'm sitting next to the WAP that has the same long CAT6 length, so why would my wifi be faster? Regardless, isn't 90mb down and 10mb up sufficient for 4k tv?