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Now also Micron with DDR400

Now also Micron with DDR400

Yesterday, Micron sold the first DDR400 chips to SIS. Micron moved straight away with Samsung, who had already shipped their chips a few days ago. SIS needs the DDR400 chips to test its new chipset for the Pentium 4, the SIS648.

However, these chips are still manufactured in DDR-I format as for the current memory chips DDR266 and DDR333. The disadvantage of this procedure is that these modules can only tolerate a maximum of 200 MHz clock frequency. For higher clock frequencies the DDR-II format has to be used, which is more expensive to produce. One advantage of the DDR-II format is the lower operating voltage of only 1.8 V compared to 2.5 V for conventional modules. The first test samples of the DDR400 chips in the future DDR-II format are not expected for a few months; series production will probably only start in 2003. You also have to wait until 2003 for the even higher DDR533.

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