If you are using a CRT monitor and not LCD or Plasma, you can use a program called PowerStrip by EnTech to tweak any resolution your monitor supports to 50Hz or even interlace on the higher resolutions.

http://www.entechtaiwan.net/util/ps.shtm

> hi!
>
> im currently having trouble using pal games in emulator such as zsnes and
> winuae.
> as my monitor doesn't support 50hz resolutions, i use 100hz (+vsync) to play pal
> games. but actually it doesn't run as smooth as ntsc-games in one of the 60hz
> resolutions - especially with side-scrollers like super mario etc.
> is there anything i can do about that - i mean is there a better solution for
> pal games than run them at 100hz?
> ... i hope so :-))
>
> bye,
> sadd
>