Zalman CNPS8700NT CPU Cooler Compatible with all single, dual, and quad core CPUs for Intel socket 775 and AMD socket AM2/754/939/940. Compatible with Slim Tower / Low Profile Home Theatre PC Enclosures. Automatic Fan Speed Control feature included in the Ultra Quiet 110mm PWM(Pulse Width Modulation) enabled fan. Patented curved heatpipe design for heat transfer performance of up to 4 heatpipes using just 2. Ultra-thin 0.2mm fins for minimized weight and significantly reduced airflow resistance.