360° View - Glacialtech Igloo 5750 PWM Heatsink Information on Frostytech's test methodology is available here.
There are two 20x92x92mm PWM compliant fans on the Glacialtech Igloo 5057 PWM heatsink - each spins at 800-2500RPM depending on the temperature of the CPU and BIOS setting. Power is supplied to both fans via a single 4-pin motherboard fan header. The seven bladed impeller is not protected by a fan grill, so watch out for loose wires! With the upper fan removed we can see the four 6mm diameter heatpipes threading though the 40 or so 0.3mm thick aluminum fins. The aluminum fins are spaced 1.5mm apart.
Standing about 122mm tall, the Igloo 5057 PWM heatsink conveniently uses tool-free Intel clips and easy to install AMD brackets. The Intel clips quickly lock into the PCB holes surrounding the LGA775 Intel processor socket, the AMD bracket requires a screwdriver. Notice the short 19mm tall extruded aluminum heatsink which forms the base cap of this heatsink. The heatpipes are soldered to this component, and the copper base below.
The Igloo 5057 PWM's two fans efficiently exhaust directly towards the base heatsink. The four heatpipes are soldered to the base, but not to the aluminum fins. A patch of grey thermal compound comes pre-applied by the manufacturer. The base measures 33x33mm in size, which is a little undersized for AMD processors and its 37.5mm square integrated heat spreader.