Bad for Gaming

I got this.. , and unfortunately have had to replace it. Running an AMD FX-6300 with Sapphire R7 GPU, and when running graphically intensive games, my system would simply crash unexpectedly due to overheating. This case is not well ventilated, as it only has a small fan in the back and room for one on the side. There also seems to be room for a fan on the front, but the vents are really small so that would be pretty pointless. Seems like this would be a fine case for basic computing, but anything processor intensive is gonna overheat in that small, unventilated space.