I would think the more performance of floating instructions with pentium CPU than those of AMD CPU,maybe DVD decoded to do with the sum of floating instructions .
This is the system of mine on watching DVD ,its pretty good
windows 95 osr2 english
pentium-100
16mb ram
120mb hdd
2x DVD ROM
S3 tr64 PCI VGA
586VX mainboard
hollawood DVD decode
hollawood remote controller