i got an old V5 on a computer and I can't change display settings (eg. brightness)...what to do?

[gururu]

any ideas how to change video settings?

 

[Delorian]

Have you checked your drivers? Maybe uninstall, run driver cleaner and reinstall. Also which OS?

 

[Schadenfroh]

you can download and install 3dfx tools seperatly from drivers