How many ZED X MINI cameras can ZED Box handle?

Hi,
How many ZED X MINI cameras can be connected to ZED Box?
The specification of ZED Box says that 4xGMSL2 can be possible. Does it mean it can be connected with 4 ZED X MINI cameras?

if so, how many FPS can be recorded with this setting?

Is ZED Box Orin Nano 8 GB model capable of 4 ZED X MINI cameras? or Do I need to choose Orin NX 16 GB model?