Well I really dont know if its the CPU or me.

Im trying to get 4.2 stable for 24/7, I was able to reach 4ghz very easily but now 4.2 seems to be impossible with a safe vcore (safe= less or equal to 1.3652, I think that was the last option called safe by intel).

Now Im trying with 1.31VTT, 1.3652 Vcore, 1.65Vdimm, everything else is stock or auto.
And the rest of the options are BCLK 200x21 (TURBO Enabled with EIST also Enabled in order to get 21 multiplier), the Ram is 200x8= 1600mhz, UNCORE 200x18= 3600mhz, HT Enabled.

The batch of cpu is 3911A, I read that 39 are not that great as the 38 ones.