"The Radeon HD 4670 looks even better when we take that long-debated
question of multi-GPU tactics into account. We saw scaling that reached
into the 80% and above range with our pair of HD 4670s - something that is
possible only because the GPU is most definitely the bottleneck in our
gaming tests. The upgrade potential 3-6 months down the road for a user
buying one of these GPUs today is compelling - $90 (and probably lower than
that in the future) is a much easier cost to swallow for a sweet increase in
gaming performance."