ATI Technologies RADEON X1950 XTX - Manual (Page 76)

70
flicker-free. The acronym refers to the National Television Systems
Committee, which devised this color video standard in 1953.
Offscreen Memory
An area of memory used to preload images so that they can be quickly
drawn to the screen. Offscreen memory refers to all of the remaining video
memory not taken up by the front buffer, which holds the contents of the
display screen currently visible.
OpenGL ®
Short for “Open Graphics Library,” this is an industry standard for cross-
platform 3D graphics development. It consists of a large number of
functions that can be called upon in various programs, such as games,
CAD, and virtual-reality systems, to produce complex 3D objects from
simpler, more “primitive” building blocks. Implementations currently exist
under Windows
® , Mac OS ® X, and various forms of Unix, including Linux ® .
ATI Overdrive
ATI Overdrive maximizes the performance of the GPU by dynamically
altering its speed to an optimal level depending on usage. An on-chip
thermal sensor constantly monitors the temperature of the GPU, allowing
for maximum clock speed to be maintained while avoiding overheating.
PAL
An acronym for “Phase Alternating Line”, the name for a video broadcast
standard used in much of Europe (except France), most of Asia, the
Middle-East, Africa and Australia. It draws a total of 625 vertical interlaced
frames of video at a refresh rate of 25 Hz.
PCI
Acronym for “Peripheral Component Interconnect”, which is the
specification for a type of computer bus used for attaching computer
peripherals to a computer’s motherboard. PCI encompasses both integrated
motherboard components (such as built-in graphical processors) and
peripherals that fit into an expansion card slot, such as a separate graphics
card. PCI replaced the older ISA and VESA bus standards, and was itself
superseded by the AGP standard for the main graphics card bus.