Fedora 14: Slow graphic rendering

[neocrust]

In my Fedora 14 i have very slow graphic rendering speed:
1. Very slow scrolling with Firefox (smooth scrolling disabled).
2. glxgears about ~75 FPS (for example, in my Gentoo glxgears about ~1200 FPS)

Video: ATI Radeon X550 (r300)
RAM: 1,5 Gb

$ glxinfo | grep OpenGL
OpenGL vendor string: X.Org R300 Project
OpenGL renderer string: Gallium 0.4 on RV370
OpenGL version string: 2.1 Mesa 7.9
OpenGL shading language version string: 1.20
OpenGL extensions:

$ glxinfo | grep direct
direct rendering: Yes

Help...