ECC (error-correcting code) memory adds extra check bits that allow the memory controller to automatically correct any single-bit error it detects in a word of data and to detect (but not correct) double-bit errors. Parity memory can only detect single-bit errors, while standard non-ECC memory provides no error detection or correction. Knowing this difference helps technicians choose appropriate RAM for mission-critical systems where data integrity is essential.
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CompTIA A+ 220-1101 (V14)
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