Maybe it is, maybe it isn't. If both the Ati card and the 8600GT are getting >100fps then it is insignificant. If they are getting <60fps then it is significant.Also, even if Wine is tailored to Nvidia cards, is it still insignificant that the ATI card performs no better than the 8600GT card?
This would be more useful.Maybe the poster should test with Nexuiz and Unigine? Maybe try Doom 3 and use the Test Suite???