Release 310 drivers (310.33, 310.54, 310.61) introduced new power-optimizing enhancements. As a result of these enhancements, you may notice that GPU core clock speeds are different with this driver for desktop and notebook GPUs. For example, the GPU core clock might be faster when the GPU is in idle mode than in previous drivers. Or you may notice higher GPU core clock speeds after closing or opening certain games than in previous drivers. This is because the reported GPU core clock frequency is no longer correlated to GPU power-saving states. Instead of lowering the GPU core clock frequency, the hardware and software use other methods to put the GPU into a low power state when the GPU is idle or in response to changing application requirements. This ensures optimum power while providing high graphics performance.