What is DDR3 SDRAM?
DDR3 SDRAM (Double Data Rate Three Synchronous Dynamic Random Access Memory) is the third generation of DDR SDRAM.
DDR3 SDRAM improves on DDR2 SDRAM in several significant ways:
- Higher bandwidth due to increased clock rate
- Reduced power consumption due to 90mm fabrication technology
- Pre-fetch buffer is doubled to 8 bits to further increase performance
The voltage of DDR3 SDRAM DIMM's was lowered from 1.8V to 1.5V. This reduces power consumption and heat generation, as well as enabling more dense memory configurations for higher capacities.
Standard DDR3 SDRAM DIMM's
DDR3 SDRAM is normally packaged in DIMM modules.
| DIMM Module | Chip Type | Clock Speed | Data Rate | Transfer Rate |
|---|---|---|---|---|
| PC3-6400 | DDR3-800 | 400 | 800 | 6,400 |
| PC3-8500 | DDR3-1066 | 533 | 1066 | 8,530 |
| PC3-10667 | DDR3-1333 | 667 | 1333 | 10,660 |
| PC3-12800 | DDR3-1600 | 800 | 1600 | 12,800 |
| PC3-14900 | DDR3-1866 | 933 | 1866 | 14,930 |
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