FAQ

Important! In order to support full Windows 8 functionality, BIOS of your motherboard must be converted from ROM to CAP structure. Before you can update any .CAP BIOS file to your motherboard, you must execute BIOS Converter designed specifically for your motherboard. Please follow the detailed instructions below.

First, please check the table below to find out whether your current BIOS is .ROM or .CAP.
 

Model lists

P9X79 DELUXE

P9X79 PRO

P9X79

SABERTOOTH X79

Rampage IV Extreme

Rampage IV Extreme/BATTLEFIELD 3

Rampage IV Formula

Rampage IV Formula/BATTLEFIELD 3

Rampage IV GENE
.ROM BIOS support BIOS version 1203 or previous version BIOS version 1404 or previous version
.CAP BIOS support BIOS version 2002 or later version BIOS version 2003 or later version

If your current BIOS version is .ROM, follow the instructions below to execute BIOS CONVERTER to flash .CAP BIOS file onto your motherboard. The BIOS CONVERTERs apply only to selected X79 series motherboards. Refer to the table below table for the BIOS CONVERTER and its corresponding model.
 

MB Model name

BIOS Converter
P9X79 DELUXE P9X79-DELUXE-CAP-Converter.ROM
P9X79 PRO P9X79-PRO-CAP-Converter.ROM
P9X79 P9X79-CAP-Converter.ROM
SABERTOOTH X79 SABERTOOTH-X79-CAP-Converter.ROM
Rampage IV Extreme Rampage-IV-Extreme-CAP-Converter.ROM
Rampage IV Formula Rampage-IV-Formula-CAP-Converter.ROM
Rampage IV Gene Rampage-IV-Gene-CAP-Converter.ROM

Here we will use P9X79 as an example.
1. Please go to ASUS website at http://support.asus.com. Key in the model of your motherboard, P9X79, in the search field. Then go to BIOS Utilities in the Download section, and download P9X79-CAP-Converter. Decompress and save it in the root directory of your USB flash disk.
2. Use any of following methods to update the BIOS: USB BIOS FLASHBACK, EZ Flash 2, or ASUS Update.
Note: You need to rename the BIOS CONVERTER file for use with the above flash utilities. Refer to the table below for the naming convention.
 

MB Model name

Downloaded BIOS Converter New BIOS Converter name
P9X79 DELUXE P9X79-DELUXE-CAP-Converter.ROM P9X79D.ROM
P9X79 PRO P9X79-PRO-CAP-Converter.ROM P9X79PRO.ROM
P9X79 P9X79-CAP-Converter.ROM P9X79.ROM
SABERTOOTH X79 SABERTOOTH-X79-CAP-Converter.ROM SABERX79.ROM
Rampage IV Extreme Rampage-IV-Extreme-CAP-Converter.ROM R4E.ROM
Rampage IV Formula Rampage-IV-Formula-CAP-Converter.ROM R4F.ROM
Rampage IV Gene Rampage-IV-Gene-CAP-Converter.ROM R4G.ROM

3. The system will reboot twice. After that, the conversion to .CAP BIOS structure is completed.
Note: After converting your BIOS to .CAP structure, you cannot convert it back to .ROM structure.