A BIOS update is often needed for newer 4th gen CPUs (e.g., Refresh/Haswell-S) to function properly.
2x SATA III (6Gb/s) ports and 2x SATA II (3Gb/s) ports. Fan Headers: 1x 4-pin CPU_FAN and 1x 4-pin SYS_FAN. BIOS and Boot Settings To configure the system or install a new OS: Front panel pin installation, help! - Acer Community Acer H81h3-am V1.0 Manual
Connecting your case cables properly requires matching the headers on the lower section of the motherboard. Front Panel Header (F_PANEL) A BIOS update is often needed for newer 4th gen CPUs (e