DDR SDRAM was the follow-on technology to SDRAM and is the predecessor to subsequent generations of DDR2 and DDR3. DDR provides a lower voltage level and higher data transfer compared to SDRAM. The voltage level is reduced from 3.30 volts to 2.50 volts and the memory module provides a data transfer on both transitions of the clock signal. This produces more data transfers for a given clock speed, but with the drawback of increased latency.
Virtium supports industrial DDR modules in a wide range of configurations and features that are available in 184 and 200 pin DIMM and 200 pin SODIMM form factors.
|Densities||256MB, 512MB, 1GB, 2GB and 4GB|
|Form Factors||DIMM, SODIMM and Mini-DIMM|
|Height||Standard, VLP and Blade VLP|
|Type||Registered or Unbuffered|
|Error Correction||ECC or Non-ECC|
|Speed||PC3200, PC2700 and PC2100|
|Data Transfer Speed (MT/s)||400, 333 and 266|
|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|