SilenX Effizio EFZ-120HA5 CPU Cooler Review


Finally we have the heatsink installed, and ready for some temperature testing.

Here we can note that there is ample room for another fan if need be, and also room for the cooler to be configured in a horizontal configuration. We used this orientation so that the air exiting the cooler would provide some cooling benefit to the motherboard cooler.

Users must be careful to orient the device in a manner that will not conflict with their RAM slots if they are using RAM with very tall fins. In that case a sideways orientation will be needed to prevent blocking of the nearest RAM slot to the cooler. For normal sized RAM sticks, this would not be an issue.

The cooler performed admirably in our testing. With the room temperature at 21C these results (also in Celsius) are excellent. For lower temperature, there is also the option of using more powerful fans as well. It is pretty impressive that with 1600 RPM fans that the cooler had these great results.


When we initially received this product and it was noted that the included fan was only 1600 RPM, I was very skeptical to be honest. A cooler with a 1600 RPM fan just doesn’t strike me as something that would be ‘in my category’. Overclocking and performance are very large considerations, and frankly one wouldn’t think a 1600 RPM fan could manage to hold down the temps that we require.

As we started looking into the device and the several innovative features as we were setting up, there was a feeling of ‘well…maybe.”

Things such as the fin alignment, the dimpled fin surfaces and the auxiliary heatsink on the top of the contact surface really started to set in as features of a very well thought out device. The exposed heatpipes for greater heat transfer also really stuck out as something that would translate to real performance.

The attention to detail and the leveraging of every possible method of performance enhancement really paid off for SilenX in this respect. We were very surprised with the performance with the low RPM fan, and when they say it is silent, they mean it! It is very quiet and unobtrusive when it comes to noise levels.

There is the option to connect more, or faster, fans to this heatsink if one were to really being pushing the limits with the processor. For 90 percent of the users out there, this stock solution will afford them great, quiet performance with an easy installation.

Considering that some of the more popular heatsinks can easily run 60 dollars without a fan, this cooler definitely scores huge in the bang-for-buck category. Coming in at $32.99 at many reputable resellers this is sure to be a big hit for Silenx.

For this price point, one would be hard pressed to find a complete solution, with the fan and even the TIM, that would come close to the great ratio of performance and silence that this unit provides. Efficiency integrated into design is the key to this class of heatsink, and SilenX definitely pulls off a winner here!


SilenX is a company of humble beginnings, with a group of engineering students who craved for silence from their computers. Starting in 1995 these students began to test and develop cooling systems that became integrated into recording studios and sound labs, due to their impressive low noise performance. Fast forward 16 years, and SilenX is now providing efficient low decibel cooling systems for OEM usage and also computer users of every background. Today finds us testing one of the new coolers from their popular Effizio line, the EFZ-120HA5 heatsink. With our recently decommissioned test bench being converted to an air…

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