One time I really felt like putting up the heat, so I cranked the AC from 75 farenheit to 85...
Well, the computer crashed, and the sticker melted right off of the GPU.
The environment plays an important part in computer stability.
that being said, what do you mean crashes MORE! It should NEVER crash unless you have defective hardware, overclock too much, or desperately need a reformat.
So lower your OC or find the defective part and replace it.