I have two rb411A with R52N cards.
On each side i have only one antenna. My previous link with this boards and R52 cards in Turbo-G mode show good performace(25-30 Mb/s hd -77/-76 dbm 50-60% CCQ). This link in G/B mode (20MHz) give bad results. R52N cards in 2 GH-only n mode shows -78 dbm, 19-30% CCQ and very low speed and unstable link.
How can I turn R52N in "turbo" mode with 40 MHz channel width for make link much stable?

*bump*. I've would like to know this, too.

/M

Ah .. actually found it http://wiki.mikrotik.com/wiki/Wireless#802.11n_specific.

/M

The R52N cards are not compatible with the a/b/g turbo modes, are they?

They are not.