From a post to a mailing list:
> I will be willing to bet that the RB133 cant push both of the high powered
>cards. I know a RB532 cant do it.
I am willing to take that bet -- maybe a few cigars and some scotch!
All joking aside, it has been tested with three SR2 cards doing
continuous transmit (a special test transmit regime where it uses the
most power possible). The current version of the RB500 that is
shipping can also support three or more high power cards.
The three SR2 cards together get very hot, so we have a fan power
header so that you can circulate air in the enclosure to distribute
the heat better and basically cool the cards. The fan power header
uses whatever voltage is coming into the board, so you will have to
get a fan that can work with that voltage -- 12V fans are easy to
find and most can work fine with 18V, or you can power with
12V... If you are using the high power cards in a tight enclosure,
we think it is best to use a fan also, but we have not seen a failure
without the fan, so it is just a precaution.