I have tried this on several games. I have the machine DUAL booting both OSs
to test the games like for like. Eg take Star Trek Legacy. In XP, smooth
graphics great sound, in Vista, graphics stutter and sound is choppy and
stuttering / distorted.
This is running on a Nvidia 6600 chipset on PCI-E with 256Mb and a realtek
ac97 both using the 64 bit Vista drivers, the CPU is an AMD 64 3700. I could
even live with the graphics being worse than XP if it wasn't for the sound
being completely RUBBISH on Vista. This happens on all 3D graphics + Audio,
even on FMV intro movies. Is this DirectX related?? NOT impressed. This is
running on Vista Home Premium, what gives huh?