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Asus P5E with TWIN2X4096-6400C5 (8GB total)


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I've been trying to get this combination stable for the last week or so now, without much luck. From what I can tell there is nothing wrong with the RAM, but the bios is not great and the settings need to be very specific.


I am using BIOS version 0602 (the latest) with a Q6600 CPU. All of the settings are Auto, except DRAM voltage which is set to 1.9V and Northbridge which is set to 1.45v. After 12 hours of Memtest I had some errors and the motherboard would not reboot without me pulling out power cables to it, as well as two sticks of RAM.


After looking around these forums, I've set the DRAM frequency to 667MHZ and the DRAM voltage to 2.0v. I'll see how it goes with Memtest, but I am wondering what other settings I may need to change?


Any help would be much appreciated.




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I think you've got it, but these are the settings to try. When stable then you can begin to play with the Static Read Control, Transaction Booster and the AI Clock Twister.


Download memtest from--->
and extract the ISO image. Burn the ISO image to an CD-ROM disk.

AI Overclocking: Manual

CPU Ratio Control: Auto

FSB Frequency: 266

FSB Strap to North Bridge: 266

PCI-E Frequency: 100

DRAM Frequency: 667

DRAM Command Rate: 2T


DRAM Timing Control: Manual

CAS# Latency: 5

RAS# to CAS# Delay: 5

RAS# Precharge: 5

RAS# Activate Time: 15

All the Rest of the Advanced Timings set to "Auto"


DRAM Static Read Control: Disabled

Transaction Booster: Disabled



CPU Voltage: Auto

CPU Voltage Reference: Auto

CPU Voltage Damper: Enabled

CPU PLL Voltage: Auto

DRAM Voltage: 2.0

FSB Termination Voltage: Auto

North Bridge Voltage: 1.4

North Bridge Voltage Reference: Auto

South Bridge Voltage: Auto


Boot to the Memtest CD and allow for two full passes.

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