Enermax Active Power Factor Correction - Internal 1000 Power Supply ETL1000EWT-M, Black Hybrid modular and 100% Flexible flat cable design - facilitate system installation, reduce cable clutter, and enhance internal airflow and cooling performance Durable two ball Bearing fan with advanced fan speed control for optimal cooling, minimum noise, and longer Lifetime World famous brand main electrolytic capacitor - high component standards for maximum durability and stability Intel Haswell support - advanced technology of load balancer stabilizes voltage output to support C6/C7 States of Intel Haswell CPU 24/7 @ 40 C ready - non-stop industrial Class performance at 40 C/104 F ambient