Computer Glossary R
Raid redundant array of independent disks. A disk drive that has
two or more drives so it can provide a constant backup in case
of failure, or produce higher performance rates.
RAM random access memory. The main memory of a PC,
measured in megabytes, holding frequently used data. The
more you have, the faster your PC can work, though there are
different kinds that operate at different speeds (see also
SDRAM, Rambus and DDR RAM).
Rambus A kind of memory technology, used exclusively by Intel,
suitable for demanding applications. Its higher bandwidth makes
it more efficient that SDRAM and very slightly faster than DDR
(double data rate) RAM.
Redundancy The doubling-up of components, such as power
supply or network cards on a server, so that if one fails, the
other can take over.
Refresh Rate The number of times a monitor’s screen
information is updated every second. The higher the rate, the
smoother the display will be and the less flicker you’ll see. It is
measured in hertz.
Rimm Rambus inline memory module. Also known as RDRAM,
this type of memory has the potential to run at speeds up to
800MHz as opposed to SDRAM’s maximum of 133MHz. Speed
is also increased by processing instructions 16bits at a time
rather than 8bit.
Risc reduced instruction set computer. A microprocessor
designed to perform a smaller number of types of computer
instructions. It can operate at a higher speed so it is therefore
cheaper and faster than standard processors.
Router A device used to link multiple networks together. More
effective when multiple paths are available as it can read the
destination address of each packet of data and determine the
best path for it to take.
RPM revolutions per minute. A measurement of how fast a disc
spins, for example, the platter in a hard drive.
|
