It actually was between PIII and IV on capabilities. Altivec allows to play h264 videos on some settings. A Pentium III, well, SSE and FFMPEG can do magic, but

It actually was between PIII and IV on capabilities. Altivec allows to play h264 videos on some settings. A Pentium III, well, SSE and FFMPEG can do magic, but not as well as Altivec. SSE2 it's better, much better. Basically the minimum for x86 and 'modern' browsers. On the architecture itself, PowerPC did far more per cycle.