![]() ECC, which is an extra data byte lane used for correcting minor errors and detecting major errors for better reliability.In addition to bandwidth and capacity variants, DDR2 modules can optionally implement: The JEDEC standards for DDR2 memory are listed below: Standard name Like DDR, DDR2 DIMMs are identified by their peak transfer capacity (often called bandwidth). DDR2 requires less power primarily due to an improved manufacturing process through die shrinkage, resulting in a drop in operating voltage (1.8 V compared to DDR's 2.5 V).
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