thermals at mac’s are critical. make sure that your cooling-system works properly. a frozen mac with a green display is a 100% indication that the mac has stopped because of overheating !
read the link below carefully, install mbpfan and configure it for your suites. keep care of the graphic-card-temperature. this is the most vulnerable part of apple-designs.
feel free to ask if you need some more advice installing mbpfan, but everything should be explained in the link