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Asus P5Q Premium with TWIN2X1024-6400C4


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I am trying to get a system built with a P5Q-Premium mb and TWIN2X1024-6400C4 memory. I have 2 of the TWIN2X kits for a total of 4 DIMMS. I have tried to get the system to boot properly with both kits individually and all installed. I can get it to boot if i choose F2 to load defaults. But as soon as i make any changes in the BIOS (or even enter in to the BIOS and exit without saving) the computer wont post. I have to clear the CMOS and start over again.


I am using the 4-4-4-12 values.


I have tried setting the DRAM Voltage to 2.10 and NB Voltage from 1.10 all the way to 1.34.


DRAM Frequency set to DDR2-800


FSB Strap set to Auto and to 266MHz


Are there any other settings i should try?

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When you populate all four DRAM slots it is advised to drop the bandwidth.


Please research this thread:




The issue is the On Motherboard (Intel) memory controller and a population of all four banks at the full speed of a two bank run. This issue is across the board with both Nvidia and Intel chipset based boards, DDR, DDR2 and DDR3.


Keep in mind that often issues arise in the longer term. The issues seldom damage the DRAM. They damage the on motherboard memory controller which has a harder time keeping up with the demands of a four DRAM slot population being run as fast as a two DRAM slot population. Those who want to be secure in their system either purchase a single kit of the DRAM capacity that the four singles have or they move to a higher bandwidth DRAM and drop the bandwidth. I also advise it as I have personally seen the issues that can and often do arise with a four DRAM slot population running at the full speed of a single kit speed.


I personally advise for a two stick solution as it is far gentler to the motherboard memory controller.


At any rate, I can help you with the settings. Please research the above and understand what has to be done. You will have to drop your bandwidth and raise the voltage on the memory controller. There's no use giving you the settings if you intend on bypassing the advice though. If you do so, hopefully you will not be posting here in the future with problems.

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