DDR

DDR, which stands for Double Data Rate, is a type of synchronous dynamic random access memory (SDRAM). This is the volatile memory used in personal computers as well as many other computerised devices. The DDR memory enables double the data transfer rate as compared to conventional memory chips. It achieves this task by allowing data transfer on both the ’peaks’ and the ’troughs’ of the clock signal.

A unique feature of this kind of memory is that it increases the speed of data transfer without any subsequent increase in the frequency of the front side bus (FSB). There are four basic speeds offered by DDR RAM chips. DDR200 offers a peak data transfer rate of 1.6 GB/second, DDR-266 offers around 2.13 GB/second, DDR-333 has a speed of 2.66 GB/second and DDR-400 permits a transfer speed of 3.2 GB/second.

DRR RAM comes in varied memory capacities ranging from 256 MB to 512 MB to 1 GB. The performance of a computer has a strong dependence on the RAM as both the operating system, as well as all the open applications, use resources from the volatile memory. Higher the RAM, faster is the computer and also more the number of software applications that can be opened.