At the moment my 3700 Sandy is totally stable at 2.86Ghz with a Vcore of 1.45 (rises up to 1.47 when the computer is under full load). The CPU idles at 29C and rises to 41C on full load. When I try and overclock slightly more without raising the Vcore the system becomes unstable after about 20 minutes on Prime95. Should I keep on overclocking further, by raising the Vcore? Will this shorten the lifespan of the CPU?