ASUS P5Q DLX Template :

JumperFree Configuration Settings
AI Overclock tuner: Manual
CPU Ratio Setting: 8
FSB Strap to North Bridge: 400
FSB Frequency: 505
PCI-E Frequency: 100
DRAM Frequency: 1010
DRAM CLK Skew on Channel A1: AUTO
DRAM CLK Skew on Channel A2: AUTO
DRAM CLK Skew on Channel B1: AUTO
DRAM CLK Skew on Channel B2: AUTO
DRAM Timing Control: Manual

1st Information :

CAS# Latency: 5
DRAM RAS# to CAS# Delay: 5
DRAM RAS# Precharge: 5
DRAM RAS# Activate to Precharge: 15
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: 55
Write Recovery Time: AUTO
Read to Precharge Time: AUTO

2nd Information :

READ to WRITE Delay (S/D): AUTO
Write to Read Delay (S): AUTO
WRITE to READ Delay (D): AUTO
READ to READ Delay (S): AUTO
READ to READ Delay (D): AUTO
WRITE to WRITE Delay (S): AUTO
WRITE to WRITE Delay (D): AUTO

3rd Information :

WRITE to PRE Delay: AUTO
READ to PRE Delay: AUTO
PRE to PRE Delay: AUTO
ALL PRE to ACT Delay: AUTO
ALL PRE to REF Delay: AUTO
DRAM Static Read Control: Disabled
DRAM Read Training: AUTO
MEM. OC Charger: AUTO
AI Clock Twister: LIGHT
AI Transaction Booster: AUTO

CPU Voltage: 1.28
CPU GTL Voltage Reference (0/2): 0.635
CPU GTL Voltage Reference (1/3): 0.635
CPU PLL Voltage: 1.56
FSB Termination Voltage: 1.34
DRAM Voltage: 2.06
NB Voltage: 1.26
NB GTL Reference: 0.635
SBridge Voltage: AUTO
PCIE SATA Voltage: AUTO

Load Line Calibration: Enabled
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
CPU Clock Skew : Auto
NB Clock Skew : Auto

Advance CPU Settings
CPU Ratio Setting: Manual
CPU VID: Default
C1E Suppport: Disabled
Max CPUID Value Limit: Disabled
Intel® Virtualization Tech: Disabled
Vanderpool Technology: Disabled
CPU TM Function: Disabled
Execute Disable Bit: Disabled

the above are my settings for the e8400. i was stable at 515 x 8 for about 8 hours on prime blend. i started to mess around with settings again to get 4.25 ghz but couldnt get any stable config. im reaching for 500 x 8.5 but cant get it stable... dunno what to try next. any suggestions?