2x 8Gb will be better/faster because it can run in dual channel mode if the motherboard supports it.
The difference is not noticeable though.
Yeah, that's the problem with most of little performance gains, unless you add 50-100% increase it's hard to notice.
@chez_jay started
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2x 8Gb will be better/faster because it can run in dual channel mode if the motherboard supports it.