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Backgound
If you actively follow the technology industry, you've heard all the hoopla about how double data rate (DDR) memory is twice as fast as regular SDRAM. You've probably also heard that DDR isn't compatible with standard SDRAM. So if you want to use DDR, you'll need an entirely new system. Now the big question is, should you bite the bullet and shell out the money for a new system that uses DDR.
The answer depends on what kind of computer user you are and how happy you are with your current system.
Before we go much farther, let's make one thing clear: systems with double data rate (DDR) memory are not twice as fast as systems without DDR. DDR is twice as fast as standard (single data rate) SDRAM, but the speed of a system depends on a lot of different factors-not just the memory.
However, while DDR doesn't double overall system performance, it can lead to significant performance improvements. In order to see the biggest performance gains, you'll want to get a system designed to take advantage of the benefits of DDR.
Here is a idea to lead you to choose your DDR memory.
PC1600 = DDR 200MHz (100 x 2)
PC2100 = DDR 266MHz (133 x 2)
PC2400 = DDR 300MHz (150 x 2)
PC2700 = DDR 333MHz (166 x 2)
PC3000 = DDR 366MHz (183 x 2)
PC3200 = DDR 400MHz (200 x 2)
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