PRECISION 7670 BIOS UPGRADE 1.20.1

Does anybody has tried the bios version 1.20.1 with dell precision 7670 ? Is it ok or the general performance are  degrated like it was the case with with bios version 1.18.0 ? when you start the computer you have only the bios "dell" logo or you have the "dell securiy" logo like it was the case with bios 1.18.0 ? Thank you for your help