напиши вот это в конфиг и должно быть минимум 70 фпс 
gl_dither "1"
gl_cull "1"
gl_keeptjunctions "0"
gl_max_size "128"
gl_clear "0"
d_spriteskip "0"
r_dynamic "1"
r_mirroralpha "0"
gl_palette_tex "0"
r_norefresh "0"
gl_round_down "5"
cl_weather "0"
max_shells "0"
gl_texturemode "GL_LINEAR_MIPMAP_NEAREST"
gl_wateramp "0"
r_shadows "0"
r_waterwarp 0
fastsprites 1
cl_highmodels 0
cl_shadows 0
gl_picmip 1
gl_playermip 2
joystick 0
r_mmx 1
