DDR3 Memory

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DDR3 SDRAM is a performance evolution and enhancement of SDRAM technology starting at 800 Mb/s, which is the highest data rate supported by most DDR2 SDRAMs. DDR3 SDRAMs support six levels of data rates and clock speeds (See Table 3). DDR3-800/1066/1333 SDRAMs became available in 2007, while DDR3 -1600/1866 SDRAMs are expected in 2008 and DDR3 -2133 SDRAMs in 2009.

DDR3 -1066 SDRAM uses less power than DDR2-800 SDRAM because the DDR3 SDRAM operating voltage is 1.5 volts, which is 83% of DDR2 SDRAM’s 1.8 volts. Also, the DDR3 SDRAM data DQ drivers are at higher 34 ohms impedance than DDR2 SDRAM’s lower 18 ohms impedance.

DDR3 SDRAM will start with 512 Mb of memory and will grow to 8 Gb memory in the future. Just like DDR2 SDRAM, DDR3 SDRAM data output configurations include x4, x8 and x16. DDR3 SDRAM has eight banks where as DDR2 SDRAM has four or eight depending upon the memory size.

                            

                                              DDR3 SLOTS

DDR3 SDRAM                 Data Rate                      Memory Clock

DDR3-800                      800 Mb/s/pin                         400 MHz

DDR3-1066                  1066Mb/s/pin                          533 MHz

DDR3-1333                  1333Mb/s/pin                          667 MHz

DDR3-1600                  1600 Mb/s/pin                         800 MHz

DDR3-1866                  1866Mb/s/pin                          933 MHz

DDR3-2133                  2133Mb/s/pin                        1066 MHz

To see and buy click on links below:

1GB                2GB               4GB                8GB