I think if you just put it to 0 it automatically syncs with your video card settings. I have it at 0 and I've never played with it anyways. To be honest I'm not even sure why we have it or what it does...
Hi, no 0 doesnt work also. Custom frequency did work before this new version. Now frequency is alway is 60hz. Forcing via other tools like Refreshforce etc doesnt work also.
And playing with 60hz on a CRT is impossible for peoples eyes.