Cooler Master Hyper N620 Reviewairman - September 8, 2009
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The size of the Hyper N620 is the first thing I noticed. It is a 120mm heatsink, which is pretty much the norm nowadays, but the two fans on either side of the unit and the heatpipe standoff from the base make it look quite large. Once it was in my hand, it didn't feel very heavy and I wasn't uncomfortable with the fact that it will soon be directly bolted to, and towering off of the testbeds motherboard. I was actually pleasantly surprised at the weight of the cooler. The aluminum fins are quite sturdy and don't flex very much under pressure. The six heatpipes that the Hyper N620 offers are all copper, which is now fairly common.
The two included 120mm fans are well-disguised blue LED fans. Due to its color, I didn't expect it to be lit. The darker, but slightly translucent blades shows a nice, subtle glow that isn't too bright. They are wired together so that only one plug is required to run into the motherboard, which is a standard 4-pin, PWM header. They operate off of 12v and have a current draw of 0.37A each. At full speed they are audible, but not too bothersome - and I am usually pretty picky about noise. The tops of the fans attach into the metal cover at the top of the heatsink with screws, and the bottoms of the fans have rubber "plugs" that slip between a small cutout in the fins themselves. The rubber plugs help eliminate noise caused by vibration, of which I heard none.
The base of the Hyper N620 doesn't leave much to be desired. It is pretty close to mirror finish with no machine marks, as seen in the picture below. Looking at it straight on, my nose's reflection was a little bit "pinched", which indicated that the base was slightly concave. This concavity is extremely slight, but noticeable by the reflection in the picture below. A quick and easy lap job would fix this, but I will be testing this cooler as is from the factory. I also noticed that the heatpipes didn't make direct contact with the copper plate, and some sort of filler material was used, also seen in the picture below. Judging simply on this, the Hyper N620 would probably perform better if they were fit better into the contact plate.
Once installed, the size is pretty obvious. It is oriented in a way so that it won't block access to the memory slots, whereas not all heatsinks have taken this into consideration. Recently though, this hasn't been an issue. I did not fit this cooler in a case with a top-mount power supply, but I can say that if it does fit that it would be very tight. If the test case were only less than an inch skinnier, I would have trouble getting the Hyper N620 to fit, if at all. It didn't have a problem clearing the northbridge heatsink, and that is due to the larger heatpipe standoff that I mentioned earlier. A picture of the amount of glow the LEDs emit is below. I tried to carefully set my exposure levels so that the picture is what is observed with the naked eye.
With the heatsink installed, let's check out the manufacturer specifications on the next page, and then test and compare this heatsink to others.