A kedvedért elkezdtem megkeresni, hogy ténylegesen mekkora is a gyorsulás az új driverekkel.
"We benchmarked each card in 11 different games, using three different driver builds that were released in a two-year time span. Nvidia's card improved the most, an average of 4.3 percent per game versus 2.3 percent for AMD. "
Forrás

Szerintem itt zárhatjuk ezt a dolgot.