In order to chance the V-sync Value manually you must locate the settings.txt located at (User)\AppData\Local\Electronic Arts\Dead Space\settings.txt. once open you can change the V-sync Value from 60 to 120 (or double your Monitors Refresh rate). By doing this you should have a proper 60fps with V-sync. So in settings.txt if the V-sync Value is 60, the game will run at 30, if the value is 120 it will run at 60fps, at 240 it will run at 120fps and so on.
Topic on Talk:Dead Space
Tried this and it doesn't work. Even with the v-sync value set to 120 it still locks at 30.
You are both right.
It's just that the game uses a 30FPS lock when it's in windowed mode, and a half-refresh-sync when it's in fullscreen.
No, it ALWAYS synchs to a fixed value of 30. My monitor has 144Hz, and when in fullscreen or windowed mode, it goes to 30FPS with Vsync enabled, no matter what.