So I've had a Lenovo ideacentre K300 for about 4 years now and have been gradually upgrading it. It now has its original 3.2 gHtz CPU, 12 GB DDR3 RAM, a Radeon 7870 GPU, and I'm unaware of the type of motherboard, all powered by a new CZO 600W 80 plus PSU. Recently I have begun pushing it a little harder and have noticed that when it reaches a certain point of stress it will bluescreen. I originally thought this was the result of a weak PSU so I got a power meter but at the point of bluescreen it's only using 120W. Any ideas on why its doing this? (could it be the CPU overheating?)