Because Acer used this board in the Aspire TC-605:
As of 2021, the original manual for the MS7869 (Ver 10) was removed from many official mirrors. However, here are the verified sources still hosting the PDF: ms7869 ver 10 motherboard manual 2021
Since you may not have the PDF right now, here are the most demanded sections from the . Because Acer used this board in the Aspire