My E5200 ran pretty good @280 w/12 mutliplier for my first oc attempt. As I was mimicing Toms May budget build, I left it @ 3.50ghz for a couple days as I loaded all my software. I was thinking I got a decent chip as I was able to squeeze my voltage down to under 1.20 with no issues. Temps at max were maybe 48C on the cores. However, when I pushed it a bit last nite to 281, it would not even post. Ran the voltage slowly up to 1.37 (!!) and still nothing. Set everything back to my original OC specs and she's sweet again. My ? is, in everything I've been reading, I don't recall people failing to post with such a small incremental increase, especially that she was so stable to begin with. Is something maybe set or hardcoded into my Bios that is doing this to 'protect' my chip? I/m running a G41 chipset and a GiGaBT MB. Sorry if this is as stupid as my last post! thnks....