Slowing down or throttling the cycles render (GPU)

Hey guys, I’ve been searching everywhere.

Is there any way to throttle the render speeds for cycles? I just got a brand new Nvidia 970 (Feeling pretty good), But whenever I render a large or complex scene in cycles, the gpu gradually keeps heating to the point where I abort the scene at about 74C°

Is there any way to stop the renderer from always attempting to use 100% of the gpu so I can avoid gradual overheating? if only to preserve the life of my graphics card.