| DRAM DDR |
 DDR has provided an evolutionary path from Synchronous DRAM (or SDR). It is the first DRAM technology to transfer data on both the rising and falling edge of the clock. JEDEC standardized DDR technology with a power supply voltage of 2.5V for transfer data rates from 266Mb/s to 333Mb/s and 2.6V for 400Mb/s. DDR has been widely adopted and remains designed for a variety of applications especially for ones with longer life cycles and upgrade requirements like Servers and Networking systems. |
| DIMM Type | # of Pins | Density | Profile | Voltage |
|---|---|---|---|---|
Registered ECC DIMM |
184-pin | 256MB - 1GB | 1.25" | 2.5V |
Unbuffered ECC DIMM |
184-pin | 256MB - 1GB | 1.25" | 2.5V |
Non-ECC DIMM |
184-pin | 512MB - 1GB | 1.25" | 2.5V |
Unbuffered ECC SODIMM |
200-pin | 256MB - 1GB | 1.25" | 2.5V |
Non-ECC SODIMM |
200-pin | 128MB - 1GB | 1.25" | 2.5V |
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