2-in-1 CPU Cooler Ninja cooler is a versatile CPU cooler which supports both fan & fanless mode! With fan mode, the cooler is ready for the high-end CPU cooling (with low noise), and with fanless mode, you are in silent mode (noiseless!) You can get 2 great features in 1 CPU cooler! Great Value Fanless Heatpipe CPU Cooler For the great performance and total 6xheatpipe, Ninja cooler is the value-for-money fanless cooler available in the market! Universal Socket Compatibility Ninja is compatible for socket 478/754/939/940 & the new LGA775. All in one solution for your PC system! Optional 120mm Fan Mounting Clips In order to build a high-end and low-noise PC system, the Ninja cooler is equipped with the optional 120mm fan clips! Light Weight Fanless CPU Cooler With the given performance level and size of the heatsink, the Ninja cooler is light-weight fanless cooler available in the market! Easy Installation-Just One Clip Easy one clip and screwless design for the quick and easiest installation ever! (for socket 478) Model Name: SCNJ-1000 Ninja Heatpipe CPU Cooler Manufacturer: Scythe Co., Ltd., Japan Compatibility: Intel: Celeron (socket 478) all speeds Pentium 4 (socket 478) all speeds LGA775 (socket 775) all speeds AMD: Sempron (socket 754) all speeds Athlon 64 (socket 754) all speeds Athlon 64FX (socket 754) all speeds Opteron (socket 939) all speeds Opteron (socket 940) all speeds CPU Clock Speed Limit: This product is not recommended to use with a high CPU frequency under the fanless mode. If you plan to use this item under fanless mode, your CPU load should be limited to low-middle loading. For high-end usage, we recommend to use an optional 120mm fan. Please use this product at your own risk. Heatsink Dimensions: 110 x 110 x 150mm Fan Noise Level: Completely ZERO dB design (with fanless mode) Optional Fan: 120mm Fan Clip Included (Fan not included) Weight: 665g