I've tried up to 1.42 vcore in Bios for 4.4 Ghz and always the same BSOD
at 4.3 Ghz , Im Really rock solid stable at 1.3375vcore with 1.29375v QPI VTT

As soon as I raise by 1 mhz the base clock...this BSOD start to show 0x0000003B
This is my stable setting at 4294Mhz 50 Passes Linx, 70'c maximum temp recorded (HT On)

Code:
Target CPU Frequency                  4294MHz
Target DRAM Frequency                1636MHz

LN2 Mode                              [No]***
QPI Loadline Calibration              [Yes]***

Sync Mode                             [Enabled]
AI Overclock Tuner                    [Manual]
OC From CPU level Up                  [Auto]
CPU Ratio Setting                     [21]  
CPU Turbo Power Limit                 [Disabled]

>CPU Configuration----------------------------
CPU Ratio Setting                     [21]
C1E Support                           [Disabled]
Hardware Prefetcher                   [Enabled]
Adjacent Cache Line Prefetcher        [Enabled]
Intel(R) Virtualiyation Tech          [Enabled]
CPU TM Function                       [Disabled]
Execute Disable Bit                   [Disabled]
Intel(R) HT Technology                [Enabled]
Active Processor Cores                [*ALL]
A20M                                  [Disabled]
Intel(R) SpeedStep(TM) Tech           [Disabled]
Intel(R) C-STATE Tech                 [Disabled]
C State package limit setting         [Auto]
----------------------------------------------

BCLK Frequency                        [204]
PCIE Frequency                        [105]
DRAM Frequency                        [1636]
UCLK Frequency                        [3681]
QPI Link Data Rate                    [Auto]

Memory Configuration Protect          [Disabled]
>DRAM Timing Control--------------------------
CAS# Latency                          [8]
RAS# to CAS# Delay                    [8]
RAS# PRE Time                         [8]
RAS# ACT Time                         [20]
RAS# to RAS# Delay                    [Auto]
REF Cycle Time                        [Auto]
WRITE Recovery Time                   [Auto]
READ to PRE Time                      [Auto]
FOUR ACT WIN Time                     [Auto]
Back-To-BackCAS# Delay                [Auto]

Timing Mode                           [Auto]
Round Trip Latency on CHA             [Auto]
Round Trip Latency on CHB             [Auto]
Round Trip Latency on CHC             [Auto]

WRITE To READ Delay(DD)               [Auto]
WRITE To READ Delay(DR)               [Auto]
WRITE To READ Delay(SR)               [Auto]
READ To WRITE Delay(DD)               [Auto]
READ To WRITE Delay(DR)               [Auto]
READ To WRITE Delay(SR)               [Auto]
READ To READ Delay(DD)                [Auto]
READ To READ Delay(DR)                [Auto]
READ To READ Delay(SR)                [Auto]
WRITE To WRITE Delay(DD)              [Auto]
WRITE To WRITE Delay(DR)              [Auto]
WRITE To WRITE Delay(SR)              [Auto]
----------------------------------------------

CPU Differential Amplitude            [Auto]
CPU Clock Skew                        [Auto]
IOH Clock Skew                        [Auto]
------------ Extreme Engine Digi+ ------------
Digi+ PWR Mode                        [T-Balanced]
PWR Volt. Control                     [Auto]
Load-Line Calibration                 [Auto]
CPU Voltege OCP                       [Enabled]
CPU PWM Frequency                     [Auto]

Extreme OV                            [Disabled]
Extreme OC                            [Disabled]

CPU Voltage                           [1.3375v]
CPU PLL Voltage                       [1.84175v]
QPI/DRAM Core Voltage                 [1.29375v]
DRAM Bus Voltage                      [1.643v]

>DRAM REF Voltages----------------------------
DRAM DATA REF Voltage on CHA          [Auto]
DRAM CTRL REF Voltage on CHA          [Auto]
DRAM DATA REF Voltage on CHB          [Auto]
DRAM CTRL REF Voltage on CHB          [Auto]
DRAM DATA REF Voltage on CHC          [Auto]
DRAM CTRL REF Voltage on CHC          [Auto]
----------------------------------------------

IOH Voltage                           [1.20616v]
IOH PCIE Voltage                      [1.52431v]

ICH Voltage                           [1.12666v]
ICH PCIE Voltage                      [1.51106v]

---------- Spread Spectrum Control -----------
CPU Spread Spectrum                   [Disabled]
DRAM Spread Spectrum                  [Disabled]



***on-board jumper dependant