Aniket,
Are you concerned about speed in X or on the console? There are a number of possible ways to configure your X-server. In increasing order of performance:
1. Using the framebuffer (man fbdev) 2. Using generic vesa mode (man vesa) 3. ProSavage(unaccelerated) driver that comes with XFree86 (man savage) 4. DRI-enabled driver (accelerated) from http://dri.freedesktop.org/snapshots/ See http://dri.freedesktop.org for more on this.
Without getting into too many details, if the system works fine on FC4 you could copy that configuration file (/etc/X11/XF86Config OR /etc/X11/XF86Config-4) to the Suse installation - it's worth a try! Just make sure you backup the original files.
- farazs