Dell OptiPlex GX240 User Manual

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there, the microprocessor retrieves it from the much-faster cache memory.
Drive caching and RAM caching significantly improve the overall speed of
the computer. See also

L1 Cache

and

L2 Cache

Compact disc. An optical form of storage media, typically used for audio and
application programs.

CD-R

CD recordable. A recordable version of a

. Data can be recorded only once

onto a CD-R. Once recorded, the data cannot be erased or written over.

CD-RW

CD rewritable. A rewritable version of a

. Data can be written to a CD-

RW, then erased and written over (rewritten).

Chip

See

CIM

Common Information Model. CIM allows remote management application
programs to access system management information on a client computer
running any Microsoft Windows

that includes the

WBEM

core

components.

Clock Speed

The speed, given in

MHz

, that indicates how fast computer components

operate that are connected to the system

bus

. The speed is generated by a

quartz crystal on the system board that acts as a kind of metronome.
Components that are synchronized with the clock speed can run faster or
slower, but their speed is determined by multiplying or dividing a factor by
the clock speed.

Centimeter(s). A measurement of length equal to 0.39 inch.

CMOS

Complementary metal-oxide semiconductor. Memory

chips

that are often used

for

NVRAM

storage.

COA

Certificate of Authenticity. The Microsoft Windows COA is a 25-digit alpha-
numeric code located on a sticker on your computer. You need the COA to