The steady adoption of ITX amongst system builders has given rise to some small but powerful PC hardware, and Thermalright’s AXP-100 looks to further improve CPU thermals of your bite-sized machine. While a six-heatpipe configuration can normally be found in mammoth CPU coolers, the AXP-100 manages to pack in the same number, directing the CPU heat towards the heatspreader and fan array. The AXP-100 includes a 100mm fan, but also comes with a secondary fan mount that can accommodate even bigger fans, up to 140mm. With a 5.8cm clearance, the Thermalright AXP-100 should fit in snugly in an ITX setup. What's more, the AXP-100 supports the LGA 2011 socket, which is a pretty good indication that you'll be getting some decent overclocking headroom with this diminutive CPU cooler.
Source: PC Gamer