"We love to see our chips run faster and we understand that our customers want to squeeze as much performance as possible out of their GPUs. However there is a physical limit to the amount of voltage that can be applied to a GPU before the silicon begins to degrade through electromigration. Essentially, excessive voltages on transistors can over time "evaporate" the metal in a key spot destroying or degrading the performance of the chip. Unfortunately, since the process happens over time it's not always immediately obvious when it's happening. Overvoltaging above our max spec does exactly this. It raises the operating voltage beyond our rated max and can erode the GPU silicon over time."
But what about Kepler's GPU Boost, doesn't this lead to premature wear on the GPU? No, it doesn't. NVIDIA also explained that GPU Boost only increases the voltage and clock speed applied to the GPU within the safe, recommended limits, thus maximising GPU performance while maintaining its longevity.
NVIDIA explains GeForce GTX 680 voltage control restrictions
Posted on Sunday, October 07 2012 @ 20:11 CEST by Thomas De Maesschalck