Acer Aahd3-vc Motherboard Manual -

Expansion slots across lower half: one PCIe x16 for GPU, one or more PCIe x1 or legacy PCI.

CMOS battery and clear CMOS jumper near lower area — jumper labelled CLR_CMOS/CLRTC.

System fan headers: SYS_FAN1 (and possibly SYS_FAN2).

Onboard headers for speaker/keyboard lock (OEM-specific).

I scoured the internet so you don't have to. Acer no longer hosts the AAHD3-VC manual on their main site. However, the board is technically identical to the Acer IPIMB-AR Rev 1.02A (different silkscreen, same PCB).

Direct links (Check your region):

Alternatively, save this blog post as a PDF. This is the manual now. acer aahd3-vc motherboard manual

The AAHD3-VC is a micro-ATX (or sometimes proprietary uATX) motherboard based on the Intel B85 Express chipset. It supports 4th generation Intel Core processors (Haswell). Expansion slots across lower half: one PCIe x16