From what I've read it's not really dependent on how intensive you play, it's more like you either have a defective unit or not. Most testing and review sites had 20 hour sessions without any problems to speak off, and according to Sony support, it MIGHT either be the power cable (can be exchanged with PS3 cable to test), the HDD connectors (can be repaired/checked without voiding the warranty), the HDMI connectors and discrepancies in PS4/TV firmware. Anyway that's their official support stance, who knows what they are trying to cover up by saying they haven't determined the exact problem yet^^