I just finish my rig and everything seem stable now. I don't know is 2500k can go to 4.2ghz, or 4.3ghz without changing anything except change the ratio. is it stable or not? i'd like to know before i'll do it. temp idle: 30, max temp with prime 95 about 56; cooler master hyper tx3 with ic diamond timming. What is the safe temp for overclocking? also, when i open cpuz, the base clock is 99.8. its not 100 like other one i watched on youtube or other site.