The Micron MT8HTF646AY-40EB8 is a specialized 512MB DDR2 SDRAM module designed for high-stability environments like entry-level servers and professional workstations. Operating at a clock speed of 400 MHz (PC2-3200), this 240-pin UDIMM features a single-rank (1Rx8) configuration and runs at a standard 1.8V. As a pair, these sticks provide a total of 1GB of memory, offering a reliable solution for legacy hardware maintenance or specialized industrial computing tasks.

What sets this memory apart is its ECC (Error Correcting Code) functionality, which identifies and repairs internal data corruption to prevent system crashes. Because these are unbuffered ECC modules, they occupy a specific niche: they are generally incompatible with standard consumer desktops and high-end servers requiring "Registered" memory. They are best suited for systems like older Dell Precision or HP Z-series workstations that explicitly support unbuffered ECC DDR2 technology.