Matching ram, adding third stick Does third slot matter?

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In other words, a single stick, will not operate in dual-channel mode There is no indication that 3 sticks is a supported configuration, but

In notebooks , Small outline Dual Input Memory Module slots are used since there is lack of space in smaller and compact devices SO- X99 - RAM only works in slots 1 or 3 · EITHER of the two remaining RAM units works correctly in position 1 or 3

coffee slot It depends on how much RAM you want and how many DIMMs you'll use to get there 16GB of RAM should do the trick if you're mostly focused on 3 Triple RAM Stick Similarly, placing a third RAM promotes efficient data transfer between all memory sticks The 3rd RAM is positioned between A2 and B2