Look for a printed string near the PCI slots or CPU. It often starts with "MS-" followed by four digits and a version number (e.g., MS-7522 VER: 1.0 ).
Many users still rely on this motherboard for: lenovo n1996 motherboard drivers
(an ACA supplier code) found on many MSI-manufactured boards used by Lenovo, Acer, and HP. Look for a printed string near the PCI slots or CPU