Looks good, have you tested the pref of the realteks nics? Would be cool to see some ipref stats between two of these considering they're running 2.5G.
Are you running Linux or BSD?
2U Rack enclosure build, housing 3xODroid H2 and a 400 watt power supply. The power supply is way overkill, as the H2 are about 4w each.