The term VGA (Video Graphics Array or Video Graphics Adapter) is a graphics display system for PCs developed by IBM. VGA has become one of the standards for the PC image. In text mode, VGA provides a resolution of 720 by 400 pixels. In graphics mode, the resolution is either 640 by 480 (with 16 colors) or 320 by 200 (with 256 colors). The color palette is 262,144.Unlike earlier graphic standards for PCs - MDA, CGA, EGA and VGA - uses analog signals rather than digital signals. Since its introduction in 1987, several other standards have been developed that offer greater resolution and more colors (SVGA, XGA ...), but VGA remains the denominator used. All personal computers manufactured today still have support VGA, and possibly some other more advanced connection.

ATX corresponds to a standard that was created to improve Baby-At. The idea of ??this improvement was rejoining carasterísticas to improve the speed and what it cost to mount a plate. ATX measures are 30.5 cm x 24.4 cm. From here in the ATX format we can be found different formats - E-ATX has measure 30 cm by 33 cm - ATX-30 having a measurement 30.5 24.4 cm - Mini ATX has a measure x 28.4 cm