As we remember, Si-128 SE has been so far the best “top” cooler (i.e. a cooler with the airflow directed to the top of the mainboard). Now we can pronounce Thermalright AXP-140 our new leader in this category. It managed to win 2-3°C from the former champion under maximum workload. Yes, the 140-mm fan does play an important role here. When we replaced it with a 120-mm one, the temperature increased by the same 2-3°C. However, a 140-mm fan installed onto a SI-128 SE doesn’t do any additional good (the results are even 1°C worse than with a Magma fan, because Scythe Kaze Maru has a larger rotor and less focused airflow).

http://www.xbitlabs.com/articles/coo...t-axp-140.html