"ASUS P5Q Deluxe discussion".

[BdON003]

I am having real trouble getting my system stable at 450x9. I have P5Q-DLX with E0 E8400 and Mushkin Redline DDR2-1000 2x2gb ram. I have been testing a lot at this speed and just cannot pass the prime95 blend test. My best was around 2.5 hours with no fail. I ran Linx for 150+ runs/8hrs+ and small fft for 6h+ so I am pretty sure it is not my cpu. I am using the 1708 bios and I am wondering if it is my board, ram, or possible at a dead-spot. Here are the settings of my longest blend run:

AI Overclock tuner: Manual
CPU Ratio Setting: 9
FSB Strap to North Bridge: auto
FSB Frequency: 450
PCI-E Frequency: 100
DRAM Frequency: 901
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: 6
DRAM RAS# to CAS# Delay: 7
DRAM RAS# Precharge: 7
DRAM RAS# Activate to Precharge: 18
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: AUTO
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: Disabled
MEM. OC Charger: enable
AI Clock Twister: auto
AI Transaction Booster: auto
Common Performance Auto

CPU Voltage: 1.34375 bios
CPU GTL Voltage Reference (0/2): AUTO
CPU GTL Voltage Reference (1/3): AUTO
CPU PLL Voltage: 1.58
FSB Termination Voltage: 1.26
DRAM Voltage: 2.08v
NB Voltage: 1.36v
NB GTL Reference: AUTO
SBridge Voltage: 1.2
PCIE SATA Voltage: 1.6

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: 9
CPU VID: Disabled
C1E Suppport: Disabled
Max CPUID Value Limit: Disabled
Intel® Virtualization Tech: Enabled
CPU TM Function: Disabled
Execute Disable Bit: Enabled

I've tried DRAM voltage from 2.04 to 2.12 and 2.08 gave me the longest stability. I've also tried NB voltage from 1.34 to 1.4 and 1.36 gave the longest stability. My memory is rated in CPU-Z as 5-5-5-12@500MHz@2.05v so I changed the memory timings to 5-5-5-12 but it seemed to hurt the issue because I could only last blend for 2h and with 2.1v. Thanks for any help.