with my own test for two board from mikrotik i see these result ...my card is xr5 with 30dbi antenna for all
the big rate that can 411a transfer is 28mbps the regular rate is 23mbps the minimum rate is 20mbps
the big rate that can 433a transfer is 58mbps the regular rate is 52mbps the minimum rate is 48mbps
with extream and turbo mod......
am doing the best i can.......
is that good result ! ! i dont know