2 x DDR2 DIMM slots, supporting up to 4GB of 800/667 MHz RAM.
To get the most reliable drivers, you should ideally use official manufacturer portals. Because this is an OEM board, you have several options: acer eg31m v.1.0 motherboard drivers
Finding the correct drivers is essential for maintaining system stability and performance on modern operating systems like Windows 7, 8.1, or 10. 2 x DDR2 DIMM slots, supporting up to 4GB of 800/667 MHz RAM