The number of dual-channel DDR platforms continues to increase, and has really created a subset of the memory market. The "matched pair" format is becoming increasingly 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, and with few exceptions, vendors offer the same basic speeds in matched pair DDR kits, as with their single module DDR.
The high-end matched pair DDR chart showed quite a bit more activity, and this would have registered even higher without a huge price increase to Corsair XMS PC3200LL 2x1-GB. This was a real anomaly, especially given the four double-digit cuts, including a $32 drop to Geil Ultra-X PC4400 2x512-MB and a $21 cut off the price of OCZ PC3200 EL 2x1-GB. Even so, the aggregate price change was still in the negative and pushed $50 for the week. If you take out the $53 spike to the Corsair memory, it was actually a pretty good update for dual-channel DDR.