2x DDR3 DIMM slots (some variants report 4); supports up to total RAM Speed 1066 / 1333 / 1600 MHz Form Factor Micro-ATX (mATX) Expansion 1x PCIe x16 (v3.0), 1x PCIe x1, 1x Mini PCIe I/O Ports HDMI, VGA, USB 3.0/2.0, RJ-45 Ethernet, HD Audio Front Panel Header Pinout

This is the #1 search reason for the manual. The pinout is proprietary:

provides the most significant performance boost for boot times and application loading Technical Resources MS-7869 compatible with gtx-1050ti - Acer Community 19 Nov 2020 —

The is an original equipment manufacturer (OEM) board engineered by MSI specifically for Acer desktop systems. It heavily populated popular pre-built tower models like the Acer Aspire TC-605 .

The board features two DDR3 DIMM slots, supporting a maximum of 16GB of RAM. DDR3 memory is affordable and widely available, making it easy to max out the memory for a performance boost. Installing memory is simple; just align the notch on the RAM module with the key in the slot and press down firmly until the side clips click into place.

Reserved for secondary mechanical Hard Drives (HDD) or Optical Drives (CD/DVD). 🗺️ Header Pinouts and Connectors

Elias knew the board was a relic of the LGA 1150 era, built for 4th-generation Intel "Haswell" processors. But in 2021, with new parts scarce and prices soaring, he decided to perform a "resurrection." He scoured the internet for the one thing Acer never publicly released: a detailed for the MS-7869.

Do not attempt to flash a BIOS from a different OEM system. An Acer BIOS on a Lenovo MS7869 will brick the board permanently.

A: Yes. Ver 1.1 just added a different audio capacitor. The manual for Ver 1.0 works for Ver 1.1.