Using single-channel rather than dual-channel mode

wmtell

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Sep 21, 2015
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I just bought an MSI A88XI mini-itx board that support two ddr3 slots. The manual says "To ensure system stability, memory modules must be of the same type and density in Dual-Channel mode." It doesn't address single-channel mode.

I'd like to have 16 GB of memory by using two 8 GB modules as 16 GB modules are very expensive. I understand dual-channel mode offers improved performance but would prefer more memory at a lower cost over faster memory at a considerably higher cost.

The manual doesn't suggest how to select dual vs. single channel mode so I'm not sure whether this is supported. I thought of trying different modules (say a 1600 and 1866) but don't know whether that would introduce instability.

Can anyone tell me whether boards like this will configure themselves as single channel mode if the modules don't match, and whether it will be stable? Or perhaps another way of achieving single-channel mode?

Thanks!

 

wmtell

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Sep 21, 2015
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Right, that lines up with what the manual says. But I'd like the memory to run in single-channel mode rather than dual-channel. For instance, by using 2x8GB with different speeds or 1x8GB and 1x4GB, etc.

Thanks for your response.
 

wmtell

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Sep 21, 2015
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I don't think I understood correctly how dual channel memory works. Thanks for straightening me out.