The new revision 3.0 of the RT-N66U – A small fan which was previously there is gone and replaced by a large passive heatsink over the 2 Broadcom radios. The 1-piece PCB is also blue instead of red and some of the components have been reshuffled around.
470uF capacitor at the power input
Mingtek Transformers used at the Gigabit PHYs
Possible hotrod connector?
MicroSD slot for memory expansion
Flipside of the PCB – a large metal sheet covers its jewels
SPANSION 256MB 3V Flash Memory