DDR2 memory chips and modules use a naming convention similar to that used for the current DDR memory modules, but are not backward compatible due to incompatible module connections (number of pins), voltage and DRAM technology. DDR2 memory modules have a different key or notch than the same-sized DDR modules to prevent their insertion into an incompatible memory socket. DDR2 memory chips will incorporate On-Die Termination (ODT) to minimize memory signal reflections at high speeds, thereby improving timing margins. Key DDR2 features: 1.8 Volts operation, reducing power consumption by about 50 percent Memory signal termination inside the memory chip ("On-Die Termination") to prevent reflected signal transmission errors. Operational enhancements Specifications: Module Type: DIMM Memory Type: DDR2 533MHZ Bandwidth: PC2-4200 Pins: 240 Gold Plated Pins NON-ECC SPD Support PC4200 533Mhz Voltage: 1.8 V Intel and AMD Certified 30 Days Money Back Lifetime Warranty Guaranteed Compatible"""  (less)

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dc7800 (ZT432EP#ABA) DDR2 memory chips and modules use a naming convention similar to that used for the current DDR memory modules, but are not backward compatible due to incompatible module connections (number of pins), voltage and DRAM technology. DDR2 memory modules have a different key or notch than the same-sized DDR modules to prevent their insertion into an incompatible memory socket. DDR2 memory chips will incorporate On-Die Termination (ODT) to minimize memory signal reflections at high speeds, thereby improving timing margins. Key DDR2 features: 1.8 Volts operation, reducing power consumption by about 50 percent Memory signal termination inside the memory chip ("On-Die Termination") to prevent reflected signal transmission errors. Operational enhancements Specifications: Module Type: DIMM Memory Type: DDR2 667 Bandwidth: PC2-5300 Pins: 240 Gold Plated Pins NON-ECC PC5300 667Mhz Voltage: 1.8 V Intel and AMD Certified 30 Days Money Back Lifetime Warranty Guaranteed Compatible"""  (less)