DDR-1, also known as DDR (Dual Data Rate) was a revolution in DRAM technology. It
doubled the bandwidth, and improved performance of SDR SDRAM technology. DDR enables
transfer of data on both rising and falling edges of a clock signal. DDR still continues
to be ideal choice for many new designs, we foresee its use and thus would provide
support for as long as possible.
DDR SDRAM technology uses double data rate architecture to achieve high-speed operation.
It is a 2n-prefetch architecture which can transfer two data words per clock cycle
at the input-output pins.It also consumes less power at 2.5v as compared to its
predecessor SDR SDRAM which requires 3.3v. Long-DIMM (or Desktop RAM) comprises
of 184 connector pins, whereas SO-DIMM (Laptop RAM) comprises of 200 connector pins.
It typically has a Fast data transfer rates: PC2100 (266MT/s), PC2700 (333MT/s),
or PC3200 (400MT/s).