Hi all. Simple question. We are using a RB433ah with Wireless (Atheros AR5413) running 5Ghz. How many Ubiquiti client units (Powerstation 5’s) will the RB support?
i don’t know about Ubiquity Powerstation 5 but I was discussing with my vendor just today about this w.r.t RB711 and he says 5 nos. should be good enough on RB433AH with R52H 
It depends on how much throughput you want to deliver to your clients.
I have a RB-433AH AP with 125 long-range clients and it works OK providing all clients have serious up/down QoS rate-limiting enabled.
If you are not using rate-limiting then you may top-out around 30 clients.