SilenX Effizio EFZ-120HA5 CPU Cooler Review

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 cooled configuration, the timing couldn’t have been better!


“Outside the Box” thinking, in terms of air cooling performance and noise levels, is what has led SilenX to the position they are today.  Lets see what they have to offer with this new cooler.

The box is sturdy and attractive, giving a glimpse of the heatsink inside.

The rear of the box lists the advantages and benefits of the heatsink, including the types of sockets and systems that this cooler will work with. There is quite a compatibility list, with Intel Sockets 775, 1155, 1166, 1355, 1366, and 2011 covered. On the AMD side there is support for Sockets 754, 939, 940, AM2, AM2+, and AM3. With regards to compatibility, you can slap this on just about anything.

A quick click will bring all photos up to size.

blankOn the inside of the box we can see that the unit is well packaged, with the components in separate plastic trays.



  1. blank

    Concise professional review as always Paul.

    A few questions. Would it be possible to turn the heat sink 90 degrees so that the warm air would exit through the rear case fan, or is there a clearance issue on that eVGA board? I can’t be sure if there is a clearance problem, or not, from the angle of the photo.

    Second, if turning it 90 degrees would create a clearance problem, wouldn’t a person be better off to flip the fan around so that the warm air pulled from the heat sink would exhaust through the top of the case?

    As it is now, the warm air from the heat sink would be blown directly into the graphics cards. The last thing high performance graphics cards need these days is warm air.

    • blank

      you make an excellent point about the graphics cards hammeister! I do use watercooling on my cards, so that wasn’t taken into much consideration for my personal usage, but it should be for illustrating to other users their desired setups.

      There would be absolutely no clearance issue at all if it is placed either way with this board. One could even have the air exhaust to the top, as the fan can go either direction, on either side of the heatsink.
      The only constraint would be the first RAM slot if using ram with extra long fins, but most ram would be fine. this would also only manifest itself in the configuration shown.

      Thanks for your input hammy, i will take that into consideration on my next heatsink review. Any feedback is appreciated and will only help to make future reviews even better 🙂

      • blank

        Hi, im thinking about buying this cooler and putting it on my fatality z77 professional-m. but im very concerned about if it will fit with my 4 corsair vengeance RAM sticks. i wanna run it with 2 fans (1on each side ofc) blowing out of the back of the case. i know, you would have to test it to answer this questuion but pls give me your estimate about this. that would be great.

  2. blank

    I have another question, did you this push/pull (2fans), and exhaust hot air from the back of the case. And maybe by any chance do you know is the fan manufacturer, it seem quit nice fan, to be able to put so 86CFM and be quiet at the same time !

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