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dominator xms2 8500 1066



so i got 2 1 gig sticks about 6 months ago v1.3

and recently ram was cheap so i got another 2 gigs unaware of version number which is 5.1 i believe


are they compatible running together


when i try all 4 i get det dram on my asus lcd poster


if not i will probably just buy another 2 gigs of the 5.1


ty for upcoming help


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It is never advised, nor is it supported to run with different versions of DRAM. However, the issue may well be that your Northbridge Memory Controller can not run as fast with a four DRAM slot population as it normally does with a two DRAM slot population. Insert just two sticks. Enter your BIOS. Lower your DRAM speed from 1066 to 800MHz. and increase your MCH/Northbridge voltage to 1.40v.

Download memtest from--->

and extract the ISO image. Burn the ISO image to an CD-ROM disk.

Download CPU-z from-->

Please research this thread:




The issue is the 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.


Boot to the Memtest CD and allow for two full passes. If you pass, then enter Windows, run CPU-z and post your CPU-z CPU, Memory and SPD tabs.

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With 4 modules I would suggest setting the memory frequency at DDR667 or DDR800 and set the memory Voltage to 2.1 Volts and set the NB/MCH/SPP Voltage to +.05 Volts as well and test the system with http://www.memtest.org. In addition, with some MB's (Mostly ASUS) you have to disable legacy USB in the bios when running any memory test.
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