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CMD4GX3M2B1600C8 - 4Gb = Stable, 8Gb = Unstable


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Couple of months ago I built a system (Gigabyte GA-790XT-USB3, Phemon II x4 965 BE) and initially installed one 4Gb kit CMD4GX3M2B1600C8 - running at auto settings in BIOS (1333mhz). no problems at all.


I have just installed a second 4 Gb Kit (CMD4GX3M2B1600C8, identical, still at 1333mhz) and the system is very unstable.


I first suspected a bad kit and so remove the original kit to test - rock solid again. Mixing old new modules in any 4Gb configuration and in any slot position is stable, only 8 Gb configuration is unstable.


I would be grateful for advise on what to try next.



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mixing ram even of the same model and version is not recommended, its hit or miss. you may try to raise the northbridge voltage a notch or two to see if it helps however Corsair cannot guarantee the 2 sets will play nice together.


please read the PDF linked in my sig below..

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