Industrial DDR2 SDRAM improvements over first gen. DDR included: reduced clock speed resulting in higher bus speed. Operating voltage was reduced from 2.5 volts to 1.8 volts to reduce power consumption and facilitate the use of smaller semiconductor fabrication processes. DDR2 generation also saw the introduction of additional form factors as listed below.
Virtium contributed to the advancement of the DDR2 generation with the development of ECC VLP RDIMM targeted at AdvancedTCA applications.
|Densities||1GB, 2GB, 4GB, and 8GB|
|Form Factors||DIMM, SODIMM and Mini-DIMM|
|Height||Standard, VLP and Blade VLP|
|Type||Registered or Unbuffered|
|Error Correction||ECC or non-ECC|
|Speed||PC2-6400, PC2-5300, PC2-4200 and PC2-3200|
|Data Transfer Speed (MT/s)||800, 667, 533 and 400|
|Standard Temp.||0°C to 85°C|
|Extended Temp.||-25°C to 95°C|
|Industrial Temp.||-40°C to 95°C|
|Configuration||x8 and x4|
|Rank||Single, Dual and Quad|