HardwareZone gives DDR3 memory a close look.
DDR3 memory is supposed to start where DDR2 left off. DDR3 has a data rate of 800-1600Mbps, 1.5V requirement, 8-bit prefetch for Burst Length, and new features: Asynchronous RESET, Dynamic On-Die Termination (ODT), Auto Self-Refresh (ASR), and Write Leveling.
"There is no doubt that DDR3 will offer higher performance and lower energy consumption in the long run, just as how DDR2 was to DDR, but whether you are an avid overclocker or the average Joe next door, it currently does not make sense to spend the amount of money needed to upgrade your system to DDR3 for the little benefits it provides in current 1066MHz and lower FSB systems. DDR3 may have entered the scene with more fanfare than DDR2, but the situation hasn't changed. Until 1333MHz FSB processors and platforms become mainstream and latencies drop a couple of cycles, DDR3 can safely be left in the K.I.V. folder for a while longer yet." [HardwareZone]
It's a no-brainer that at some point in time, everybody will be using the new DDR3 memory modules. As of now, though, the more bang per buck is still on DDR2's side.
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