HDMI, VGA, 4 x USB 2.0, RJ-45 LAN, and standard audio jacks (Line-in, Line-out, Mic). Front Panel Header Pinout
Acer, like many OEMs (HP, Dell), often deviates from standard ATX form factors. Acer H61h2-ad Motherboard Manual
PCIe x16, fine. PCIe x1, fine. But there was a fourth slot etched directly into the board: PCIe / ex ovo . And the rear I/O panel had an Ethernet port labeled "Not for Internet. For Intratemporal." HDMI, VGA, 4 x USB 2
. While the physical motherboard is a reliable OEM component made by ECS for Acer, finding a direct "official" manual can be tricky as it was primarily distributed as a pre-built system part rather than a standalone retail product. The Retro Web General Overview 4 x USB 2.0