I found 500R has a not-common fan connector. the fans are not using the normal 3-pin connectors.
so If you want to use the build-in fan controller to control other fans you add later, you CANNOT. because even corsair will not sell such a stupid fans to public. so the build-in controller will only work with the three white led fans.
Upgrading all the three fans to normal connector? fan controllers will not work. so you paid way to many money for something on the front that no longer work anymore.
I am returning this case. Having a firewire port that I don't use is already bad. Now Possible no longer working fan controllers and light switch? Come on...