Thermalright had claimed that the Spitfire would reduce stress temperatures of the Radeon HD 5870 by 32 degrees. This is an interesting claim as it is extremely conservative based on our findings. With the 140mm fan, which operates at just 1000 RPM, we witnessed a 44 degree drop in temperature, while the much faster 1500 RPM 120mm fan allowed for a 50 degree temperature drop.



Link: Legion Hardware