I thought that people were reporting running two of the SR2/5 cards without any problems on the Routerboard500's.
Those who can run 2 SRx in a RB probably don't have much load on the RB.
I ran 2 SR2 in a RB532; one for the client side and the other for the backhaul. During the installation, I was able to obtain reasonable bandwidth-test results for the backhaul side running both SR2 at full power. As soon as the clients started to connect on the AP, I started loosing packet badly. I had to drop the power to 17 dB on the backhaul side and something like 20-21 for the AP. Now I have a CM9 on the backhaul. Both the CM9 and the SR2 are running at full power and it is rock solid.
Does someone have tried a SRx and a Prism 200mw in a RB532?