1. Use both hands to detach front panel gently.
2. Flip front panel over to loosen two screws near USB 2.0 front I/O module and detach it gently.
3. Install USB 3.0 front I/O module (part number: G11303260) and fasten two screws back gently.
4. Assemble parts back in reverse order carefully. Your case is now USB3 ready.