OMAP 4
The 4th generation OMAPs, OMAP4430, 4460 and 4470 all use dual-core ARM Cortex-A9s as well as two ARM Cortex-M3s running at 266 MHz to offload the A9s in less computionally intensive tasks to increase power efficiency.[5][6][7] 4430 and 4460 use a PowerVR SGX540 integrated 3D graphics accelerator which runs at a clock frequency of 304 and 384 MHz respectively compared to previous incarnations of SGX540 typically at 200 MHz making them theoretically much faster.[8] 4470 has a PowerVR SGX544 GPU that supports DirectX 9 which enables it for use in Windows 8 as well as a dedicated 2D graphics core for increased power efficiency. All OMAP 4 comes with an IVA3 multimedia hardware accelerator with a programmable DSP that enables 1080p Full HD and multi-standard video encode/decode.[9][10][11][12][13] OMAP 4 use ARM-Cortex A9s with ARMs SIMD engine (Media Processing Engine, aka NEON) which may have a significant performance advantage in some cases over Nvidia Tegra 2s Cortex-A9s with non-vector floating point units.[14] It also uses a dual-channel LPDDR2 memory controller compared to Nvidia Tegra 2s single-channel memory controller.
