Kept my settings the same as I do in the regular crpg launcher, and was experiencing around a 20 or 30 FPS drop. Usually run right at 120 fps (the max I use) with occational dips to around 110.
- With beta client I was often at around 100 and sometimes down to 70 or 80.
Of course, not a huge deal - but thought I'd mention it since you said to report drops of around 20 or more.
Setting I used (in both regular and beta client) are:
Fullscreen
1680x1050
Texture and Shader at High
No AA or AF
Shadows Medium
HDR off
Particle systems off (in this case, sometimes I use it)
video card is nVideo GTX260