If Company of Heroes has historically run well on NVIDIA cards, the EGO
engine underpinning Race Driver: GRID has run creamily-smooth on ATI
hardware. That's still true today, as the HD 4890 XT is between 15-20
per cent faster than HD 4870.
Interestingly, there seems to be some driver-related quirkiness with
the GTX 275, because its scores are lower than the GTX 260's -
something that should never happen once you factor in the architecture.
We observed that the FRAPS-recorded benchmark would display extremely
erratic frame-rates, being perfectly playable one moment and
practically a slide-show the next, lowering the average frame-rate.