The changes are documented on the Dell Inspiron 3910 System BIOS page: You should always check those pages before installing a BIOS update. If the fixed issues don't apply to you, then you need not install the update. BIOS updates are risky with a desktop, since there is no battery for backup power as there is with a laptop. Don't install a BIOS update unless the desktop is connected to a UPS (uninterruptable power supply). Otherwise, if your power fails you may end up with a failed BIOS update and a bricked motherboard.
Inspiiron Desktop 3910 with 12th gen Intel Core i5-12400 processor. What is the difference or change between bios versions 1.8.2 and 1.9.0.
Desktop 3910 i5-12400 bios 1.8.2 v. 1.9.0