Igloo 4300 From All Angles

The eleven bladed impeller on this 15mm thick fan only creates about 42CFM of air flow according to the manufacturers specs, but given the small size of this heatsink that should be sufficient. The fan connects to the motherboard via a 3-pin fan header which supports RPM monitoring.

Top: With the fan removed for a moment you can really see how simple this heatsink really is. The heatsink portion is solid all the way across - there are no cross cuts, no places to screw in the fan shroud - nothing. The fan shroud is actually what keeps the heatsink in place, and without it there wouldn't be anything else to keep it from falling off.

Heatsink Base:

I really like these heatsinks which come with pre applied thermal paste. In this case, the Igloo 4300 features 'silver' based thermal material. The entire base has been milled flat prior to plating and this means the surface is fairly well finished, and perfectly flat.