I have macbook pro 15' retina early 2013
16GB RAM
SSD 512
El Capitan 10.11.6
I have FPS problem
when i play with One source i get decent FPS of about 55-60.
But when I connect another video source (2 LED CARD Outputs), the FPS drops down to 10-18 FPS
is there any way to increase the FPS?
Or there's something I need to change my computer settings?
any helps or tips will be appreciated,
Thanks

Rubi