When sourcing CPU fans, you must first verify Socket Compatibility (e.g., LGA 1700, 1200, or 115x) to ensure the mounting brackets align with the Intel motherboard. Key performance metrics include TDP (Thermal Design Power) rating, which should meet or exceed the CPU's heat output, and CFM (Cubic Feet per Minute), indicating airflow volume. Additionally, prioritize fans with PWM (Pulse Width Modulation) support for dynamic speed control and Hydraulic or Dual Ball Bearings for a lifespan exceeding 50,000 hours.