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 the 2x256-MB and 2x512-MB 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 price list shows different trends than in the single-module chart, and overall prices are falling. We see a few double-digit price drops, such as with Kingston HyperX PC3200 2x512-MB, OCZ PC4400 Gold 2x256-MB, and OCZ PC4000 EL 2x512-MB. The only consistently higher prices hit the Crucial Ballistix line, but this was due to a "matched pair discount" being taken offline, rather than any price increase to the actual modules. Taking those out of the equation shows a definite trend towards lower prices, including a few very good deals.