I set up my Apple Time Capsule a few months ago and have been using it for backing up my Macbook Pro with Time Machine. I only connect to the TC with my MBP, which works with 802.11n and checked out my connection speed. I found that I typically got 120mb/s or less and was a bit surprised since I knew the theoretical limit of 802.11n was 300mb/s.
I had figured that only running my TC with my MBP would let it run at it’s fastest speed but today I looked through the settings of the TC in the Airport utility and noticed that I had been running in 802.11b/g/n mode. I switched to 802.11n(5ghz) mode and saw that I was now connected at 270-300mb/s. There was also a 802.11(2.4ghz) only mode and I tried that – found that I got ~145mb/s from the same location in my home.
It looks like I’m getting significantly better performance from running in 802.11n(5ghz) mode and this is fine since I don’t have any need to support other protocols like 802.11g
