If you have a noname (Octek, Gigabyte etc.) S3 savage4 pro (397) 16MB video card, it is recommended to try this bioses. Check your bios version and *.rom file size (40960 byte) before installing. The BIOS versions are 2.1C.07c and 2.1C.09-1.3 The second one is the better. The zip file includes a flash program that saves your current bios to a "backup.rom" file. Good luck.