When under load, I've noticed my PC tends to overheat quite a bit. The CPU usually hangs around 65 degrees, and peaks up to around 80 at times. How should I proceed in upgrading my computer, so I no longer have this problem? Except for my video card, everything in my PC is stock. I would imagine that I'd have to purchase a new case (the stock case had poor ventilation), a heat sink, and a new power supply. I put in a GeForce GTX 660 Ti and my power supply is only capable of 240V (I think). Any help is greatly appreciated.
https://i.imgur.com/Dwf6GaX.jpg
https://i.imgur.com/6Bd1AKM.jpg
https://i.imgur.com/Dwf6GaX.jpg
https://i.imgur.com/6Bd1AKM.jpg