The MediaGX CPU is an x86-compatible processor that was designed by Cyrix and manufactured by National Semiconductor following the two companies' merger.

It was also used in the CTX EzBook V92C266, Compaq Presario 1220 and 1230 laptops, Compaq Presario 2100 and 2200 desktops, Casio Cassiopeia Fiva MPC-100 series subnotebook and MPC-501 tablet PCs, and many others, as well as in high-performance embedded applications such as the Pinball 2000 arcade pinball system and Atari Games arcade platforms.

[3] Virtual Subsystem Architecture (VSA) emulates a presence of the real hardware VGA (XpressGRAPHICS) and Sound Blaster (XpressAUDIO).

The MediaGX platform does not provide support for external Level-2 cache memory, typical for motherboard designs of the period.

The graphics, sound, and PCI bus ran at the same speed as the processor clock also due to tight integration.