Acer H61h2-ad Motherboard Manual Link

Unlike retail motherboards that have clearly labeled pins for the power switch, reset switch, and LEDs, OEM Acer boards often use a specialized block connector or a non-standard pinout.

: 2 x SATA II (3.0 Gb/s) connectors for hard drives or SSDs. Acer Community Connectivity & I/O Ports Bypass 8GB RAM on motherboard H61H2 - AD (Aspire X3990)? Acer H61h2-ad Motherboard Manual

The Acer H61H2-AD motherboard manual provides detailed information on the following: Unlike retail motherboards that have clearly labeled pins

The H61H2-AD typically uses a standard and a 4-pin CPU power connector . However, because it was installed in low-power slimline desktops: Acer H61h2-ad Motherboard Manual