Re: DRIVER NEEDED: C-Media usb 7.1 ch 3d (Windows 7) [USB]
Cmedia doesn't make sound cards, they make sound chips. You will need to know what the sound chip number (ie: CMIxxxx) is before you can determine which driver it needs.
Or visit the website of the company who made your computer/motherboard and see if they offer a sound driver for it. If you had taken the time to include the computer/motherboard info (less than .10% ever do), then we could offer you something more positive.