Question about Corsair Crystal 570X RGB

1) The fans can be controlled with three buttons on the outside of the top of the case.
2)2x 120mm/2x 140mm fans can be placed at the top and only one 120mm fan at the back. and attention! with the built-in led controller, you can only control the Corsair SP120 RGB fans and only three of them can be added to the controller.
2) From the mounting places it should work, but it always depends on the mainboard.
hope I could help you ;D

You can turn off the LED's but you would have to unplug the fans from the led controller every time you want to turn them off and this control block is behind a tempered glass plate. shouldn't be too hard for corsair to just build in a black/off colour mode. :-/