Having only mid range NVidia gtx460s x2 but no working SLI (CPU quad @2.8ghz), I was struggling to get 30-40fps over water and low 20s over land with all settings on low (exept AC-on high). After a few days decided to change from 267 drivers to 270's last night. Whoaa!!!! What an improvement. Now averaging 45- low 50s over water in furballs (15-20 AC QMB) and not dipping below 30s over land. Even upped the Shading, Land and houses to medium and still in low to mid 30s over land.The only stutters are at treetop level and low over towns (as I play Arma II I kinda expected this to happen anyway with this configuration). Happier Camper now....cant wait for the SLI and other optimizations. So highly recommend NV owners to upgrade drivers.