From Fedora Project Wiki
Fedora 16 alpha (Gnome) fails to complete properly (and does not give compliance warnings) when an NVIDIA Quadro FX3400SLI (HP Supplied) is installed in an HP XW4600 Workstation. (Works fine with NVIDIA GeForce similarly scaled cards). Under Fedora 15 (Gnome) the Quadro card reports no support under Gnome 3. - Cheers - reynolds@mira.net