For official drivers or potential BIOS updates, you can try entering your SNID on the Acer Support Download Page

Avoid scam sites charging money for this manual. The original Acer IPIMB-AR Rev 1.02a manual is a free document. Do not pay for it.

Locate the jumper block (near the flat CR2032 coin-cell battery).

To initialize the memory controller in dual-channel configuration for maximum memory bandwidth, match memory kits in identical pairs. Populate slots 1 and 3, or slots 2 and 4 simultaneously.

i7-3770, i7-3770K (runs at stock speeds; no multiplier overclocking supported), i7-2700, i7-2600, i7-2600K.

Near the PCIe x16 slot, between the last PCI slot and the rear I/O panel. It is a vertical CR2032 holder.

i7-3770, i7-3770K, i7-2600, i7-2600K (Note: The B75 chipset does not support multiplier overclocking, so 'K' series chips will run strictly at stock frequencies).