Please pay attention: The Delta 6 model do not support BTX system motherboard. The BTX system motherboard is not following Intel's fastener holes position criteria. Delta 6 is high density 120 fins heat sink design and excellent manufacture skill model, to improve 30% thermal dissipation performance. Delta 6 is highly compatibility model for Intel sockets LGA775, 1156, 1155, 1151, 1150 and 1200. A large 38mm diameter solid aluminum core completely and solidly covers the heating area of the CPU processor. The processor’s hot spots can be completely covered and enhance the thermal conduction directly to remove the heat of processor rapidly. Excellent streamline fan blade shape design increases airflow volume and reduces acoustic noise generation. The excellent fan blade airfoil shape and suitable attack angle of blade to enhance the actual airflow of heat sink cooling and reduce the acoustic noise of vortex problem. Compatible with small form factor slim case: The lateral airflow intake design fan to increase the airflow volume, even if Delta 6 be installed in top side block airflow intake slim case. Buy before, please check processor’s TDP on Intel’s website first. Do not support Intel k sku processors. Delta 6 model is support 100W TDP and below, but do not support overclock operating excess TDP. Do not support BTX system. ThermalFly is professional thermal solution provider, which cares about all the thermal and acoustic issues of PC components and whole systems in the IT industry. ThermalFly solve the thermal problems not only consider system approach, but also by innovative consideration of material and manufacture. ThermalFly integrates innovative thinking into the design and manufacture, providing consumers with value-for-money products.