For those of you still having problems with ReForce, make sure to disable DDC information in the drivers and make sure in the case of ATi boards that you've correctly chosen the maximum refresh rate and resolution values in the driver control panel.
Please elaborate on heaps of OpenGL games and name at least five decent ones other than those I mentioned from the last two years that do not use three to five year old Quake engines.
At least half of the games I have installed on my machine are either OpenGL-only or run optimally under it so that Direct3D isn't an option.
And "decent"? I'm sorry but your definition of decent doesn't factor into the equation at all, with the equation being that I have numerous OpenGL games and therefore dxdiag doesn't help me at all. Also a game being Quake 3-engined doesn't somehow magically exclude it from the discusion either.
One value can be chosen and it will apply for all resolutions.
Which is precisely why it's useless.
There should be no need to choose different values as only one will be optimal for your viewing enjoyment.
Uh, how about when you change resolutions? 120 Hz ain't gonna work too well on most monitors when you work at 2048 x 1536 and likewise sticking to 75 Hz is looney if the target resolution can do 120 Hz.
That's why ReForce (or similar) is the best solution because it automatically picks the highest refresh rate available in
any given situation. You just run it once and forget about it.