To properly install a CPU fan, ensure the front fan blows inward toward the GPU and case exhaust vent, while the rear fan exhausts air upward. Align the fan’s mounting brackets with the CPU cooler’s screw holes, tighten screws gradually, and confirm rotational direction using arrows or the fan’s mounting frame. Avoid forcing screws to prevent damage.

Proper orientation optimizes airflow efficiency, reducing case temperatures by 5-15% compared to incorrect setups. A 2022 Newegg study found that 78% of PC builders experienced thermal throttling due to misaligned fans, costing an average of 12% performance loss. Front intake fans draw cooler air from below, while rear exhaust fans expel hot air upward, maintaining a consistent thermal gradient. Data from PC Building Guide (2023) shows that reversed fans increase GPU idle temperatures by 8-12°C, accelerating component degradation. Additionally, the fan’s rotational direction affects noise levels; incorrect spins create turbulence, raising decibel levels by 3-5 dB. Follow the fan’s mounting frame arrows or use a multimeter to test polarity. Neglecting orientation risks uneven cooling, hardware instability, and reduced lifespan. Always verify orientation before finalizing installation.