Recently I came to know that Nvidia GeForce GTX 680 supposed to downclock around 705 MHz in case the temperature is going to exceed 70ºC. also I noticed an issue while overclocking the device by making use of non-Adaptive power profile. I set MSI Afterburner v2.2.0 beta to 132% power limit. Also I have set +150 MHz on core clock and +350 MHz on memory clock. The card is running fine at 1,287 MHz on core. The fan speed is increased by 1% for every 1ºC above 40ºC and so far it is not exceeded 75ºC, the core clock is supposed to stick to 705 MHz though I have exited the game. I could not figured out whether it is safety feature introduced that the GPU would underclock as it supposed to hit 70ºC or its just a bug. Any clarification on this particular matter will be appreciated.