Premium between SDRAM and DDR
256Mb DDR vs 256Mb SDRAM

Figure 1: 256Mb DDR(32Mx8) price vs 256Mb SDRAM(32Mx8) price.
DDR 256Mb prices have been volatile since early July - prices rose by 43% from $4.87 (July 1) to $6.96 (July 30th). On July 18th, prices were at their highest at $7.94. DDR prices crossed over SDRAM prices on June 14th, and the maximum premium came close to $3 ($2.985) on July 19th. Average prices (from July 1st to July 30th) for DDR is $6.71;for SDRAM is $4.83. The average premium from July 1 to July 30 was $1.88.
333MHz v.s. 266MHz

Figure 2: 256Mb DDR 333MHz vs 266MHz price.
256Mb DDR 333MHz's average price (July 1 - July 30) was $7.66, and for 266MHz it was $6.71 (average premium of $0.95). The Average premium between 256Mb DDR (32Mx8)-333MHz and SDRAM (32x8)-133MHz is $2.83.
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