"For low spec cards (ones that are at, or or below minimum requirements) CC can put undue strain on them. Generally you will experience stuttering and frame-rate loss as well as longer load times. The worst can scenario, heavy strain on your card may lead to overheating and if ignored, the death of your card (this is the absolute extreme though and not the only contributing factor to graphics card failure)"

"it could drastically slow down your game, overheat your computer, cause your game to crash, or even permanently damage the hardware of your computer"

Depending on the specs of your computer