Just realized there must be some benchmarks on chimera's webpages, and I found them. :) Glad to provide the benchmarks from my systems. Benchmark 1: Computer: IBM T41 Graphics Card: ATI Radeon mobility M7 (32M?, not 100% sure) CPU: pentium-m 1.4GHz System Memory: 512M OS: Ubuntu GNU/LINUX 5.10 Driver for video card: the built-in open-source radeon driver from Xorg-x11 6.8.2 Chimera: version 1 build 2176 Benchmark scores: surface 147 mesh 127 contour 133 solid 128 recolor 68 Benchmark 2: Computer: HP XW5500 workstation Graphics Card: ATI FireGL 8800 (128M memory) CPU: pentium-4 2.4GHz System Memory: 512M OS: Gentoo GNU/LINUX Driver for video card: ATI fglrx driver 8.14.30 Chimera: version 1 build 2176 Benchmark score: surface 234 mesh 227 contour 142 solid 256 recolor 107 Something is confusing me. As you see that scores from benchmark 2 are higher than scores from benchmark 1. But in case that I want to save a protein structure as a png file, the rendering in system 1 is nearly two times faster. How can this happen? Best, Mingfeng Yang