For some reason, I've always had some issues with Intel sound and Intel graphics on various distributions. Although I've tried installing graphics drivers from the Intel website in some of those situations, I never got it to work. As I was just to lazy and those boxes are used as servers, I did not care to much and used the 810 driver (with its limitations) for those situations where I wanted to use the graphical environment.
Last week I spoiled myself with a new PC with nforce 410 (MB Biostar 6100-M9). I did not experience any problems installing and running Slackware 10.2 (some 2.4 kernel; 32bit version)). Only needed to download, compile and install the
drivers for both MB (network and sound) and onboard graphicks (obviously for the graphics). However, it's an Athlon 3000+, so can't judge on smp.
Somebody else might have experience on FC4/FC5; it
might include the NVIDIA drivers already, in which case FC5 will probably have the newer ones.
Concluding: I would try it on the AMD system.