XFX are using a Protechnic Magic MGA13512YF fan which is 135mm and rated 12V 0.50A.
The Seasonic DC to DC convertor design is very clean with several rows of heatsinks separating the components. These may seem small, but with 80 Plus Gold Efficiency and the large overhead fan, there should be no ambient temperature problems.
The XFX Black Edition power supply utilizes high quality Japanese capacitors throughout with the primary stage using three high quality Nippon Chemi Con capacitors rated for 105c operation @ 420v 390uF.
The design of this unit replaces traditional wired connections with direct pin to port connections. This reduces the heat generated by the wiring which has the subsequent benefit of reducing lost power, ensuring improved voltage. The unit includes Total Power Protection (OPP), Over Voltage Protection (OVP), Over Current Protection (OCP), Short Circuit Protection (SCP), and Over Temperature Protection (OTP).