I did something wrong the first time, now I reflashed correctly and everything is working fine. However I see no diference between the two bios. Both burned a complete dvd movie at about 6:56 on memorex 8X media. I previously owened a 8X drive and it took about 8:00 to burn the same movie so theres no important diference. I don't know if this works with certain media so if somebody knows please let me know.