DDR3 Features
Source: Microsoft via Micron.
The two graphs include very much all the important technical data about DDR3 memory. I already mentioned the reduced voltage levels and the doubled densities (there will be no DDR3 DIMMs at less than 512 MB per module). The memory packages are slightly larger and come with a higher connector count, but this shouldn't have much influence on modules.
Source: Microsoft via Micron.
DDR3 Speeds
The following table lists all DDR3 speeds that will be available until 2008.
Swipe to scroll horizontally
| Memory | Standard | Memory Clock | I/O Clock | Effective Memory Clock | Bandwidth per Channel | Dual Channel Bandwidth |
|---|---|---|---|---|---|---|
| DDR2-667 | PC2-5300 | 166 MHz | 333 MHz | 667 MHz | 5.3 GB/s | 10.6 GB/s |
| DDR2-800 | PC2-6400 | 200 MHz | 400 MHz | 800 MHz | 6.4 GB/s | 12.8 GB/s |
| DDR3-800 | PC3-6400 | 100 MHz | 400 MHz | 800 MHz | 6.4 GB/s | 12.8 GB/s |
| DDR3-1066 | PC3-8500 | 133 MHz | 533 MHz | 1066 MHz | 8.5 GB/s | 17.0 GB/s |
| DDR3-1333 | PC3-10600 | 166 MHz | 667 MHz | 1333 MHz | 10.6 GB/s | 21.2 GB/s |
| DDR3-1600 | PC3-12800 | 200 MHz | 800 MHz | 1600 MHz | 12.8 GB/s | 25.6 GB/s |
Intel expects DDR3 memory to scale all the way to DDR3-2133, which would be PC3-17000 at 266 MHz clock speed and 1066 MHz I/O clock. However, we're not sure at this time whether this will remain a niche for enthusiast products.
