For the motherboard, during the design period, because the models of some devices (such as the Northbridge chip) are fully compatible, the circuit board is made universal.
Only before production, it is decided which chip to use, and after welding production, the specific function of the motherboard can be determined.
Therefore, the motherboard is marked with the three characters A880\/A785\/A780, which means that the motherboard (light board, unwelded device circuit board) is compatible with these three specific models.
After production, if the welded on is an A880 chipset, then it is an A880, if it is a welded A780, then the motherboard is an A780.
In this case, it is not only necessary to look at the motherboard screen layer identification, but also to look at the specific chip specifications in order to truly determine the motherboard model to determine the installed driver.