I'm not totally sure I agree with anyone here. Ive ran my 3930k at 1.44 volts @ 4.8ghz for like........ 6 or 7 months daily gaming use with the occasional 1.5-1.52v overclocking runs. My 3930k has not degraded one bit. On the contrary my chip has been hitting higher and higher clocks over time to my current top clock of 5.2ghz I used to make this 3dmark 11 run http://hwbot.org/submission/2341412_...80_13820_marks
When I first got this chip 4.8ghz was the VERY maximum, and over time 4.9 became available, then 5ghz possible, then 5.1, and recently Ive been able to make 5.2ghz runs. Im sure its not entirely stable but we are talking about damage to silicone.