2x DDR3 DIMM slots, supporting up to 16GB (dual-channel) at 1600/1333 MHz. Form Factor: Micro-ATX (mATX). Expansion Slots: 1x PCIe x16 Gen 2.0 (for graphics cards). 1x PCIe x1 Gen 2.0. 2x Legacy PCI slots. Pinout and Internal Headers
Usually located at the bottom-right corner. Pins 1-2: HDD LED (indicates drive activity). Pins 2-4: Power LED (indicates system power state). Pins 5-7: Reset Switch. Pins 6-8: Power Button. Pin 1: Marked by a white square on the PCB. Power Connectors: 1x 24-pin ATX Main Power. 1x 4-pin ATX 12V CPU Power. Acer H81h3-am V1.0 Manual
14 Jul 2020 — one more picture. Share. Share. billsey. Jul 14, 2020. You have answered your own question there. The pins are numbered: 2 4 6 8.. Acer Community 2x DDR3 DIMM slots, supporting up to 16GB