Even with all special effects my Gnome environment still works sluggish. Inkscape is unusable (with some additional refreshing issue on the rulers) and when I try to draw something in GIMP the line/spray etc. moves at 2 inches (5 cm) per second. CPU usage is almost constantly over 80%, RAM usage at 300 of 600 MB. I know it's just an old laptop but it works FAR worse than my girlfriend's Asus Eee 1005 netbook running Windows 7 starter!
AMD Turion64 1.6 GHz
~600 MB RAM
gives 60 FPS
glxinfo |grep rendering
direct rendering: Yes
The file is blank!
gksudo gedit /etc/X11/xorg.conf
No graphics drivers are listed under Additional Drivers
lspci | grep VGA
01:05.0 VGA compatible controller: ATI Technologies Inc Radeon XPRESS 200M 5955 (PCIE)