bah je viens de lire vite fait la doc de gentoo et j'ai vu ça:
# Support for x86, AMD64, PowerPC, UltraSparc, Alpha and MIPS processors
# LiveCD-based installation for x86, AMD64, PowerPC, UltraSparc and Alpha
# Latest stable KDE and GNOME
# Various optimized Linux kernels
# Very modern GNU development environment
.....