Which type of RAM doubles the transfer speed of a RAM module?

The type of RAM that effectively doubles the transfer speed of a RAM module is DDR, which stands for Double Data Rate. DDR technology allows the memory to transfer data on both the rising and falling edges of the clock signal, which effectively means that it can transfer data twice as fast as traditional single data rate memory.

For example, if a specific DDR RAM operates at a clock speed of 100 MHz, it can transfer data at a rate equivalent to 200 MT/s (megatransfers per second) due to this dual-edge transfer capability. This characteristic is a fundamental advancement over earlier forms of memory, leading to significant improvements in performance for computational tasks.

Other types of RAM like Static RAM (SRAM) are faster than traditional Dynamic RAM (DRAM) but do not use the double data rate technology. DDR2, DDR3, and subsequent generations build upon the DDR technology, enhancing speed and efficiency, but in terms of the fundamental doubling of transfer speed, it is DDR that introduced this crucial technology to RAM modules.