What is difference between SD RAM and DDR RAM?
RAM stands for Random Access Memory, and it is the RAM that allows you to operate more than one program at a time on your computer. The more RAM you have, the faster your computer will be able to run programs. SD RAM was used on computers built some years ago, but manufacturers have moved on to using DDR RAM (double data rate ram), which operates faster. RD RAM is used on a limited number of computers. DDR SDRAM or double-data-rate synchronous dynamic random access memory is a class of memory integrated circuit used in computers. It achieves greater bandwidth than the preceding single-data-rate SDRAM by transferring data on the rising and falling edges of the clock signal (double pumped). Effectively, it doubles the transfer rate without increasing the frequency of the memory bus. With data being transferred 64 bits at a time, DDR SDRAM gives a transfer rate of (memory bus clock rate) × 2 (for dual rate) × 64 (number of bits transferred) / 8 (number of bits/byte). Thus with a bus frequ
