Hi everybody.

i've been researching this thread for a little while now and have been trying to get my new system stable at 4.2Ghz. I have experimented with PLL (1.4 - 1.8) and CPU voltage (1.25 - 1.35) but have consistently run into blue screens when benchmarking in PC Mark's Gaming test.

My system specs are: i7 930 (stock fan), Kingston 2000 DDR3 Triple, Silverstone 1500w, 8800GT.

If anyone has any advice on how I could get it stable at 4.2Ghz I would greatly appreciate it! Here are my bios settings:

Code:
BIOS 0878 BETA

Target CPU Frequency                  4200MHz
Target DRAM Frequency                 2005MHz

LN2 Mode                              Disabled***
QPI Loadline Calibration              Disabled***

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

>CPU Configuration----------------------------
CPU Ratio Setting                     [Auto]
C1E Support                           [Enabled]
Hardware Prefetcher                   [Enabled]
Adjacent Cache Line Prefetcher        [Enabled]
Intel(R) Virtualiyation Tech          [Enabled]
CPU TM Function                       [Enabled]
Execute Disable Bit                   [Enabled]
Intel(R) HT Technology                [Disabled]
Active Processor Cores                [All]
A20M                                  [Disabled]
Intel(R) SpeedStep(TM) Tech           [Enabled]
Intel(R) C-STATE Tech                 [Auto]
C State package limit setting         [Auto]
C1 Auto Demotion                      [Enabled]
C3 Auto Demotion                      [Enabled]
----------------------------------------------

BCLK Frequency                        [200]
PCIE Frequency                        [100]
DRAM Frequency                        [DDR3-2005]
UCLK Frequency                        [Auto]
QPI Link Data Rate                    [Auto]

Memory Configuration Protect          [Disabled]

>DRAM Timing Control--------------------------
CAS# Latency                          [7]
RAS# to CAS# Delay                    [9]
RAS# PRE Time                         [7]
RAS# ACT Time                         [24]
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                           [1N]
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-Balance]
PWR Volt. Control                     [Auto]
Load-Line Calibration                 [Auto]
CPU Voltege OCP                       [Enabled]
CPU PWM Frequency                     [Auto]

Extreme OV                            [Disabled]
Extreme OC                            [Disabled]

CPU Voltage                           [1.275]
CPU PLL Voltage                       [1.400]
QPI/DRAM Core Voltage            1.4  [Auto]
DRAM Bus Voltage                      [1.65625]

>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                           [Auto]
IOH PCIE Voltage                      [Auto]

ICH Voltage                           [Auto]
ICH PCIE Voltage                      [Auto]

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



***on-board jumper dependant