With MP3 encoding using LAME, on the Samsung NC10 the fastest was Fedora 13 but again the margins were small between Calculate Linux, Ubuntu, Sabayon, and Fedora. With the AMD Athlon II X3 system, Ubuntu and Sabayon produced the best numbers, but like the NC10 netbook the results were close.
With FFmpeg encoding, the Calculate Linux Desktop 10.4 i686 numbers were the best immediately followed by Ubuntu 10.04 and then Fedora 13 and Sabayon 5.3. With the 64-bit FFmpeg performance, the order was reversed but still to an end-user the experience would be effectively the same.
With the x264 benchmark, the H.264 encoding performance on the Samsung NC10 was effectively the same across the two Gentoo-based Linux distribution and then Ubuntu and Fedora. With the AMD Athlon II setup, it was nearly the same as well, but Ubuntu 10.04 LTS came out slightly ahead when compared to Sabayon 5.3 that came in last even though it had the most recent stable Linux kernel.