Boiled: Explain that S3, SiS and users of older intel cards. Their drivers don't support the needed minimum (TnL for example) nor do they support OpenGL at all.
These type of systems are sold even today ... with 2,5-3Ghz processors! So they will often perform far better on CPU than on GPU.
These type of systems are sold even today ... with 2,5-3Ghz processors! So they will often perform far better on CPU than on GPU.