RK2808
Supported Android OS: 1.5
ARM926E 600MHz,Linpack 2-2.5MFlops(on Android 1.5)
RAM: 128MB SDRAM,32bit (up to 512MB support)
Video decoder:Ceva MM2000,based on 550MHz DSP
multiformat,RV,H.264,VC-1,H.263,MPEG4 up to 720p
H.264 supports only up to 2Mbps. VC-1 only up to 480p. Lacks GPU acceleration.
RK2818
Supported Android OS: 2.1
ARM926E 660MHz,Linpack 3MFlops+(on Android 2.1 w/o JIT)
RAM: 256MB DDR2,32bit (up to 512MB support)
Video decoder:Ceva MM2000,based on 600MHz DSP
multiformat,RV,H.264,VC-1,H.263,MPEG4 up to 720p
GPU: ARM Mali-55
Features:OPENGL ES1.1,OPENVG
Triangles per second:1M
Pixel fill rate:100M
Slightly increased clocks compared to RK2808, but still suffers from video decoding issues at higher bitrates. GPU acceleration is so entry-level that it is useless for most 3D games. Targets low-end Android market to undercut TCC8902.