What are the advantages to buying DDR RAM in packaged pairs?

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Possibly cheaper ??

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Probably none. I would guess someone has an overstock of smaller memory chips and is trying to market them. I always prefer a single larger memory stick.

-Shawn

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DDR Memory is sometimes sold in pairs, for those setting up dual channel systems.

Dual Channelling sorta like setting up a RAID array of RAM.

Note that RAM labelled as being dual channel isn't any different then regular RAM its just two sticks of the same size.

thats all :)

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Some memory used in dual channel boards do not behave well when paired with other brands sometimes they do not even behave well when paired even with same brand and model. Paired DDR RAM assures the user that it has been tested by the manufacturer to behave well.

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Some people seem to think that it is better to fill all the memory slots on your board, than to leave an empty slot.

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The modules aren't just the same size; they are also the same speed and latency rating. Typically the chips are the same production batch and that increases the likelihood that the paired modules will work approximately at the same speed, therefore being detected (and usable) as dual-channel. It's like a cross-country trip with two cars - if car A is a performance car driven by an aggressive driver and car B is an econobox driven by a little old lady, then A can go no faster than B if both are to arrive at the same destination at the same time. If B is too slow, A may just sit and wait at the destination for a few days - you've essentially dropped into single channel mode performance, and the bios will usually detect this significant of a difference and not allow dual-channel mode.

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