You can on certain games, and others you can't. Source games such as Team Fortress and the Counter-Strike Series can be set to specific fps_maxes through the console, in game. Call of Duty: 4 and other games allowed this as well. As far as I know, The 2 battlefields prior to BF4 (BF3 and Bad Company 2) only gave you the option to have V-SYNC on or off, which when on, caps your frame rate at 60 FPS. When off, it goes as high as your computer can push it. Some people can have issues with V-SYNC, others don't mind it. I own BF4 but I turned V-SYNC off, so my computer pushes as many frames as it can at any given moment. I saw through a quick google search that you can enter a command into BF4's console, gametime.maxvariablefps 61, which appears to allow a 60 fps cap with V-SYNC off. They were did this because V-SYNC was causing input lag for them. Now whether you can change the maxvariablefps in BF4 to any number you want? You are gonna have do some more research or go in game for yourself to test out. If there is no way for you to do that, I'll fire up BF4 and test it out.