Hi there,
There is a test report posted on the forum for RB532 by Mikrotik.
Personally I got 47Mbps UDP through a pair of those boards on test.
TCP is slower.
Also Nstreme, which aggregates small packets and increases bandwidth/range performance, takes up CPU power too.
If that’s enough for you, great, use it.
Otherwise, you need more CPU power.
Mikrotik are improving their OS all the time, and later versions seem to show higher throughput for a CPU-limited system.
Regards