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Mix and match ddr333 and ddr400?

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I have an MSI Neo K8T Platinum board which doesn't recognize the full 1GB of RAM I currently have (only 512 MB seen). I've tried switching slots around and so forth with no results. This leads to my question: Since this board will support 4GB of RAM, can I mix DDR400 with DDR333 (by the motherboard settings for RAM speed) to get the full 4GB on the board?

I couldn't tell you the brand of my current memory, but this next purchase will be either Corsair, Crucial or OCZ (all of which I will find the specific sticks that are compatible with my board).


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Looking at my manual it says use matched pairs where you can. right i think i get what you are asking. In order to get the full 4gb you will need to install a full set of 4 1gb single sided modules in order to get 4gb of ddr400 but even then it will only be detected as 3+ gb. For best performance you want a matched pair of 1gb low latency pc3200 modules from someone like corsair.

But read your manual its pretty explanatory on the subject.
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