The B85H3-AM is built on the Intel B85 chipset. As an OEM board, it differs from retail motherboards in features and layout.

1 x PCIe x16 (Gen 3.0), 1 x PCIe x16 (operates at x4), 1 x PCIe x1, and 1 x PCI slot. Storage: 4 x SATA III (6Gb/s) ports.

You can find all official support files for free by searching for your specific desktop model (e.g., Veriton M4630G) rather than the motherboard part number:

ports for fast SSD/HDD data transfer and multiple USB ports, including for high-speed external devices. The Story of a Business Workhorse In the early 2010s, the Acer B85H3-AM