Thanks for the answers. Well, I know that it must be slower. Another example: I can play GTA: Vice City and GTA: San Andreas on ~50 FPS in 1920x1080. Tried running that 'debug' test that I found in FAQ, it said that the renderer is enabled. Time for an interesting fact... GTA IV can't load a savegame if the vsync is turned off. Usually turning off vsync gives a better performance, but in my case it is not even possible. What can I do?..
