MS-7869 Ver 1.0 is an OEM motherboard manufactured by MSI for Acer desktop systems, such as the Aspire TC-605
Since you may not have the PDF right now, here are the most demanded sections from the ms7869 ver 10 Motherboard Manual. ms7869 ver 10 motherboard manual 2021
You are looking for a "2021" manual because you want the latest documentation. However, MSI stopped producing new documentation for this board by 2016. MS-7869 Ver 1
desktop series, such as the TC-605, TC-705, and XC-605. Because it is an OEM part, a standalone retail manual does not exist; instead, it is covered under the general Acer Aspire TC-605 User Manual Core Specifications Socket Type Why the "2021 Manual" is Hard to Find