These chips are designed to offload video decoding, encoding, and post-processing from a computer's CPU to a compatible GPU.

Notebooks & Desktops

Intel 4500mhd DXVA and Nvidia 9400 ATI 3400 Avivo

Netbooks

Broadcom BCM70015 on 2nd gen. Atom Pinetrail

Nvidia ION and Atom 1st gen.

Media Players

Sigma and Realtek (MIPS based)

Intel CE4100

STMicroelectronics STi7167

Hybrids like Tablets, MIDs and other small computers

Tegra 2, dual-core ARM Cortex 9 based CPU

Via VX855 Media System Processor (MSP)
Qualcomm Snapdragon 8X72

Sigma SoC MIPS on Android

others like TI Omap, Zonan SIS SiS217H Cavium’s  CNW5XXX