647651-08M HP 8GB PC3-12800 DDR3-1600MHz ECC Registered CL11 240-Pin DIMM Dual Rank Memory Module
Manufacturer HP
Manufacturer Part # 647651-08M
Memory Type DDR3 SDRAM
Capacity 8GB
Data Transfer Rate 1600Mhz
Pins 240 Pin DIMM
Bus Type PC3-12800
Error Correction Registered ECC
Cycle Time 1.25ns
Cas CL11
Memory Clock 200Mhz
Rank Rank 2
Voltage 1.5
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497765-B21 . Is a DDR2 Module. DDR2 Modules run from 533 to 800 MT/s (million transfers per second) This module has a total capacity of 2GB. The Bus Type is PC-6400. Uses ECC (Error Correcting Code), ideal when system failure must be avoided at all costs. Is also registered which makes it stable enough for server conditions. Has a data transfer rate of 800 Mhz.
408855-B21 . Is a DDR2 Module. DDR2 Modules run from 533 to 800 MT/s (million transfers per second) Has a total capacity of 8GB (Gigabytes). The Bus Type is PC-5300. Its ECC (Error Correction Code) features prevent data corruption and system failure which is typically ideal for server machines. You can expect the data to transfer at a rate of 667 Mhz.
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