Motherboard Manual | Acer Aahd3-vc

| Beeps | Meaning | | :--- | :--- | | 1 short | Normal POST – OK | | 2 short | CMOS error (replace battery) | | 1 long, 2 short | Video error (bad GPU or RAM) | | Continuous long beeps | Memory not detected | | 5 short | CPU failure |

| Option | Recommended Setting | Note | | :--- | :--- | :--- | | VT-x (Intel Virtualization) | Enabled | Needed for VirtualBox/VMware | | VT-d | Disabled (unless IOMMU needed) | | | USB Legacy Support | Enabled | For booting from USB | | Wake on LAN | Disabled | Prevents phantom power-on | | Secure Boot | Disabled (for Linux/Win7) | Set to "Other OS" | acer aahd3-vc motherboard manual

A manual for the AAHD3-VC is less of an instruction guide and more of a map of limitations. | Beeps | Meaning | | :--- |

Here is the data sheet Acer never printed clearly: | Option | Recommended Setting | Note |

| Feature | Specification | | :--- | :--- | | CPU Support | Intel Core i7 / i5 / i3 / Pentium / Celeron (LGA1155) | | RAM | 4 x DDR3 DIMM slots (Dual Channel, Max 32GB, 1600MHz/1333MHz) | | Expansion Slots | 1 x PCIe x16 (Gen 3.0), 3 x PCIe x1, 1 x PCI legacy | | Storage | 2 x SATA 6Gb/s (Blue ports), 2 x SATA 3Gb/s (Black ports) | | Rear I/O | PS/2 Keyboard, VGA, 4 x USB 2.0, 2 x USB 3.0, LAN (RTL8111E), Audio | | Internal Headers | 2 x USB 2.0, 1 x USB 3.0, COM Port, LPT, Front Audio, S/PDIF |

Missing from the manual: The board technically supports XMP profiles, but Acer locks memory overclocking in the BIOS. You will run RAM at JEDEC spec (1333 or 1600) only.