My name is Vishal and I work for Dell’s Social media and Community team.
I would suggest you to logon to our support website i.e. www.support.dell.com where you need to click to drivers & downloads, then click on desktop and select OptiPlex 330 from the list. After you click on OptiPlex 330 you need to specify the operating system for your desktop and then the list of device drivers for your computer would be in front of you. Also you can visit the following link http://tinyurl.com/7ychesh
in order to directly access the drivers homepage.
Dell – Vishal S