already told you about Tegra 2 and its capability to render 71 million triangles per second. You can check that original article here
We can give you some more details. Its Peak Fill Rate with Z reject is 1200 million pixels per second and it also has programmable pixel shader. Furthermore Tegra 2 has programmable vertex and lightning engine as well as CSAA (Coverage Sampling Aliasing).
When it comes to texture resolution the GPU supports both 4K x 4K and 2K x 2K, as well as Advanced 2D and Vector engine. Some implementations will also support up to WSXGA+ (1680 x1050) screens with up to 24-bit color. It also supports parallel TTL displays and smart displays with maximum pixel clock of 120MHz.
HDMI 1.3 supports outputs up to 1080p, digital sound, analog VGA or LVDS is possible as well as all kinds of HD including 1080p.
Tegra 2 has 2.5X graphics performance of iPhone A4
LG Optimus 2X brushes competition aside