This product is either discontinued or we cannot get that from suppliers.
Antec C400 Glacial, PWM Fan Speed 600 - 1800 RPM + 10% Airflow 77 CFM Noise Level 20.3 db(A) 34.5 db(A) Lifespan 50000 hrs Connector 4-Pin LED Effect Pure White LED, Compatibility Intel LGA 775 / 1150 / 1151 / 1155 / 1156 / 1366 / 2011 / 2066 AMD FM2 / FM1 / AM3+ / AM3 / AM2 + / AM2 / AM4.
The 4-PIN PWM Silent Fan Automatically Controls the fan speeds according to the temperature of CPU to efficiently decrease noise levels. With RPM Speeds of 600 ~ 1800 RPM + 10%,