I do not want to overvolt my GTX 580 but I would like to squeeze some extra performance out of it by overclocking it slightly. What is considered a *safe* overclock for this card bearing in mind I have a Point of View model with default speeds of 772/1544/2004 MHz? At those speeds the card idles at around 30 C and rarely exceeds 75 C during gaming except for oddly Divinity II where it hits 83 C and never goes higher. Using MSI Afterburner I set the clock speeds to 825/1650/2050 MHz and tested it with the three Just Cause 2 benchmarks on max settings with 8xAA/16xAF at 1920x1200 (with includes the two exclusive NVIDIA settings too by the way). I understand this is a good test for stability. All three benchmarks ran fine as did the game when I briefly tested it. I saw no artifacts. Do you think that is a safe overclock for everyday game use or is it so low as to not be worthwhile?