QPSK is a digital frequency modulation technique used for sending data over coaxial cable networks. Since it's both easy to implement and fairly resistant to noise, QPSK is used primarily for sending data from the cable subscriber upstream to the Internet. This technique, used with Nvidia-based 3D graphics boards, speeds up texture mapping and redrawing by reducing the amount of work required.
Nvidia chips use fewer polygons to render an acceptable-looking rounded object.
Filling the screen, therefore, takes less time and CPU horsepower than it would using another rendering chip. Developed by Apple Computer, QuickTime is a method of storing sound, graphics, and movie files. If you see a MOV file on the Web or on a CD-ROM, you'll know it's a QuickTime file. Although QuickTime was originally developed for the Macintosh, player software is now available for Windows and other platforms. If you don't have a QuickTime player, you can always download versions for either Mac or PC from Apple's Web site.