Double Data Rate (DDR) SDRAM earns its name by doubling the transfer rate of ordinary SDRAM by double-pumping the data, which means transferring it on both the rising and falling edges of the clock signal.
DDR-SDRAM also consumes less power, which makes it well-suited to notebook computers.
Flash memory is non-volatile computer memory that can be electrically erased and reprogrammed.
It is a technology that is primarily used in memory cards , USB flash drives (thumb drives, handy drive, memory stick, flash stick, jump drive), which are used for general storage and transfer of data between computers and other digital products.
The Rambus RIMM module is a new class of general purpose high-performance memory subsystem suitable for use in a broad range of applications including computer memory , personal computers , workstations , and other applications where high bandwidth and low latency are required.
It's mainly adapted for Intel Pentium 4 motherboards.
Notebook computers and other computers that require much smaller components don't use standard RAM packages like the SIMM or the DIMM. Instead, they can use much smaller memory form factor called Small Outline DIMM (SoDIMM).
SoDIMMs are available in many physical implementations, including the older 32-bit (72-pin) configuration and newer 64-bit (144-pinEDO, 144-pin SDRAM and 200-pin DDR) configurations.
The newest and smallest RAM form factor is the MicroDIMM .
The MicroDIMM is an extremely small RAM form factor. In fact, it is over 50 percent smaller than a SoDIMM, only 45.5 millimetres (about 1.75 inches) long and 30 millimetres (about 1.2 inches- a bit bigger than a quarter) wide.
It was designed for the ultra light and portable sub notebook style of computer. These modules have 144 pins or 172 pins and are similar to a DIMM in that they use a 64-bit data bus.