Oke guys I now its a bit older cpu but maybe it helps somebody that has this cpu and whants to overclock it.
I will post my stable 24/7 settings for the core i7 3820.
My mobo is the asus rampage formula iv.
The cpu is cooled by a corsair h75.
My settings are
Memory is set to 1666Mhz with 9-9-9-24-1t
VTT CPU Voltage: 1.125v
Second VTTCPU: Auto
CPUVCCSA Voltage: Auto
DRAM Voltage on both Channels: 1.520
CPU PLL Voltage: 1.81250
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
DIGI+ Power Control Options
CPU Load-Line Calibration: High
CPU Current Capability: 130%
CPU Voltage Frequency: Auto
CPU Fixed Frequency: 300kHz
VRM Over Temperature Protection: Auto
CPU Power Duty Control: T.Probe
Vcore MOS volt. Control: Auto
CPU Power Phase Control: on my bord this will change automatically to extreme when I set the cpu current to 130%
CPU Vcore Bootup Voltage: Auto
I DONT RUN PRIME95 FOR 24 HOURS
the tests that I do are
prime95 45 minutes
intelburn test 10 runs at very high
linx 45 minutes at all mem
if it all passes I call it stable
I hope that this will be helpful for somebody.