DDR2 shipments in the 512-Mbit density already exceeded those of 512-Mbit DDR in the first quarter. Shipments of 512-Mbit DDR2 amounted to 132 million units during the first three months of the year, compared to 104 million for 512-Mbit DDR, according to iSuppli. This shipment crossover led to the cost crossover as the economy of scale due to mass production asserted itself.Read more at EET
512Mbit DDR2 production cost now cheaper than DDR

The producing costs for 512Mbit DDR2 memory is now cheaper than the cost of producing a 512Mbit DDR memory device.