SNK-C0054A4L Active CPU fan for S1151/ S1156/ S1200 ( sandy bridge M)
( Heatsink with retention back plate) - CPU Cooler - 1U Low Profile Form Factor - For Intel Processors - 3000~4500 ( max to 6500RPM)RPM Fan Speed - 36 dBA Acoustical Noise - Aluminum Heatsink
Dr.Thermal TI-V77L
CPU Cooler - 70mm Fan - 3800RPM Fan Speed - 34 dBA Acoustical Noise - 32.73CF/m Airflow - Aluminum + Copper Heatsink - 30 Days Store Exchange-Only Mfg. Warranty