The dual-channel memory format is the standard for high-end performance systems, and is the de facto packaging for most DDR memory. The "matched pair" format has become very popular, as these DDR module kits are perfectly suited for the requirements of high-end dual-channel DDR operation, and are a much safer buy than purchasing one module now and hoping to match it up later. The most popular configurations are currently the 2x512-MB and 2x1-GB kits (although 2x2-GB are emerging) and with few exceptions, vendors offer the same basic speeds in matched pair DDR kits, as with their single module DDR.
The dual channel DDR chart was a lot more active than the single-module listings, and there were a trio of double-digit price increases and decreases to report. In terms of price cuts, these included Crucial Ballistix Tracer PC4000 2x512-MB (-$20), Corsair XMS PC3200LL 2x1-GB (-$13), and Mushkin HiPerformance PC3200 2x1-GB (-$11), while the price spikes featured the Kingston HyperX PC4000 2x1-GB (+$25), Corsair XMS PC3200 XPert 2x1-GB (+$13), and Corsair XMS PC4400 PRO 2x1-GB (+$12) dual channel kits. The positive and negative price changes were eerily similar, and the total chart movement certainly mirrored this equality, as the overall listings only dropped by $3.