Asus DELUXE/WD P8Z77-I - Manual (Page 134)

4-20 Chapter 4: Software support
Chapter 4
2. After the utility detects a new BIOS
firmware, save the BIOS firmware by
clicking from the Save to field, select
the USB flashdrive, and click Download.
Downloading the updated BIOS
1. Click Check for New BIOS Update to
check for the latest BIOS version.
Wait for the system to check the latest
BIOS firmware.
3. After the download is complete, click OK.