The low end cooler 7-blade fan is rated for 0.2 amps at 12 volts. At full throttle, this fan spins at 3,000 RPM. At their thickest, the blades measure 3mm. The fan itself is 26 mm thick, excluding the cooler mounts. The higher end cooler fan has a rating of 0.28 amps at 12 volts, slightly higher than the all-aluminium cooler's fan. Oddly, it has the same maximum speed, 3,000 RPM. The overall dimensions are the same, except for the fin thickness and the core. The impeller blades are noticeable thicker than the other cooler, up to 3.5mm thick, and thicker for a larger section of each blade.