Best Passive CPU Cooler for Building Silent PC [Fanless CPU Coolers]

A Passive CPU Cooler is a CPU cooler that consist only of a heatsink. It has no fans and is completely silent in operation. Passive CPU Cooler is also called Fanless CPU Cooler or Noiseless CPU Cooler. These Passive CPU coolers are very hard to find because they are not in popular demand and are made by handful of companies only. Other thing is that they do not offer the same performance that you get using a normal CPU cooler with fan, and are definitely not the choice for gamers and enthusiasts who are into overclocking of their CPU for extra performance. To build a completely silent PC you need to eliminate as much fans as possible and thus you can use a passive CPU cooler for this purpose.

Good passive CPU coolers are bigger in size and you should check your computer case and motherboard dimensions before buying any such passive CPU coolers. Also, if you plan on overclocking your CPU then you should definitely stay away from the fanless CPU coolers. The main areas where these passive CPU coolers shine are in noise and the maintenance department. First of all, they are completely silent in operation (0dBA) and secondly, they do not require any maintenance because of the absence of fan. You do not have to worry about cleaning the CPU cooler fan or worry about its performance in the long run. Here in this post I am going to list down the best passive CPU coolers for building a super silent PC.

Advantages of Passive CPU Coolers

  • Silent Operation (0dB noise)
  • No Vibrations
  • No Dust accumulation
  • No Maintenance required
  • No power consumption

Must Read:

Best Passive CPU Coolers for Intel & AMD CPUs

Here are the best passive CPU coolers that are available in the market for building a quiet PC or a HTPC.

NoFan CR-80EH Copper Fanless CPU Cooler

The first passive CPU cooler in our list is the NoFan CR-80EH Copper Fanless CPU Cooler. This is a very unique looking CPU cooler and is shaped like a bucket. The CPU cooler is made of copper and has large number of very thin heat pipes known as ICE pipes. The idea here is to aim for larger surface area and dissipate as much heat to the surroundings.


NoFan CR-80EHfanless CPU cooler is compatible with almost all the popular CPU Sockets and supports CPUs having up to 80W TDP. The cooler is only 113mm tall but is a bit wider at 155mm. If you have a micro-ATX or mini-ITX motherboard then you have to make sure that the cooler does not interfere with your RAM slots and graphics card slot. I strongly advice to use low profile RAM with passive CPU coolers. The heatsink weighs at 300gm and is not heavy at all. The CPU cooler comes with its own thermal paste and mounting kit for Intel & AMD CPUs. Also, it is very affordable and delivers good performance as long as you use <80W TDP CPU and do not plan on doing overclocking or anything fishy.

NoFan CR-80EH Copper Passive CPU Cooler Specifications
CPU Socket Supported Intel LGA 1150 / 1151 / 1155 / 1156 and AMD AM4 / AM3+ / AM3 / AM2+ / AM2 / FM1 / FM2 / FM2+
Heat Pipes No, (ICE Pipes)
Cooler Width 155mm
Cooler Height 113mm
CPU TDP Support Up to 80W

Buy NoFan CR-80EH Fanless CPU Cooler

SilverStone Heligon HE02 Fanless CPU Cooler

This is a huge and monstrous passive CPU Cooler from SilverStone. The CPU cooler has got large aluminum heatsink and consist of 6 heatpipes for better transfer and dissipation of heat. The base of the cooler is made of pure copper for faster transfer of heat to the heatpipes. It supports all the popular CPU Sockets from both Intel and AMD. This fanless CPU cooler can support even the high-end processors that include top of the line Intel Core i7 processors. It can support CPUs up to 95W TDP with no case fans and 150W TDP CPUs with one 120mm case fan (>900 rpm). You can also mount a 120mm fan on it for CPUs having greater than 150W TDP.


Heligon HE02 CPU Cooler stands at 160mm tall and is 170mm wide. Due to its larger form factor you should have ATX form factor motherboard and bigger case to fit this thing perfectly. Also, it is recommended to use low profile RAM with this enormous CPU cooler. Due to its asymmetrical design, you can mount this CPU cooler in the position of your choice depending on your motherboard design, so that it won’t block your PCI-Ex16 graphics card slot or RAM slots. The cooler weighs at 1KG (approx.) and you can get it at under 100 dollars. So, if you are looking for a high performance passive CPU cooler and a big enough case then you should definitely go for it. The cooler comes with all the required mounting brackets / kits and thermal paste. Recommended by me.

SilverStone Heligon HE02 CPU Cooler Specifications
CPU Socket Supported Intel Socket LGA775/115X/1366/2011/2011-v3/2066 and AMD AM2/AM3/AM4/FM1/FM2 (V2)
Heat Pipes Yes, 6 heat pipes
Cooler Width 170mm
Cooler Height 160mm
CPU TDP Support 95W (Fanless) / 150W (with 120mm fan > 900 RPM in case), over 150W with 120mm fan on top

Buy SilverStone Heligon HE02 CPU Cooler

NoFan CR-95C Black Pearl Fanless CPU Cooler

NoFan CR-95C Black Pearl is a high-end Passive CPU Cooler and is the bigger brother of the NoFan CR-80EH CPU Cooler mentioned above. This is again massive heatsink but it is cylindrical in shape having diameter of 180mm and height of 148mm. You should be very careful when buying this fanless CPU cooler because of lack of clearance for other components and for PC case. It consists of four heatpipes and 160 thin ICE Pipes for maximum heat dissipation to the surroundings.


The cooler supports all the major Intel and AMD Sockets and CPUs up to 95W TDP. It is made of pure cooper and aluminum with copper base. The performance of this CPU Cooler is good and it can support Intel Core i7 processors without any issues. However, do not ever think of overclocking with this passive CPU cooler. The cooler weighs at around 800 grams and the package come with all the required mounting brackets /plates and thermal grease. If you have a small form factor motherboard then it may block your first VGA slot for graphics card. Also, you have to use low profile RAM with this huge passive CPU cooler. Overall, a good fanless CPU cooler that delivers but requires tons of space in your computer case.

NoFan CR-95C Black Pearl CPU Cooler Specifications
CPU Socket Supported Intel LGA 1150 / 1151 / 1155 / 1156 / 775and AMD AM3+ / AM3 / AM2+ / AM2 / FM1 / FM2 / FM2+
Heat Pipes Yes, 4 Heatpipes & IcePipes
Cooler Width 180mm (Diameter)
Cooler Height 148mm
CPU TDP Support 95W

Buy NoFan CR-95C Fanless CPU Cooler

Zalman FX100 Fanless CPU Cooler

Zalman FX100 is a high quality fanless CPU cooler that comes with a large Hexadegron heatsink and ten heatpipes. This is quite a good looking CPU cooler and it resembles a cube like shape. It is made of copper and aluminum and has got black pearl nickel plated finish. The cooler supports both Intel and AMD Sockets and up to 95W CPUs. With an optional 92mmfan (Zalman LED Fan ZM-F2Q(BL) at 650rpm) it can support higher 130W CPUs but do not advise that. The heat-sink weighs at 770g which pretty reasonable considering its size and quality.


The design of the heatsink is practical and it poses less hindrance or interference to your RAM slots or for other components. The CPU cooler is 157mm tall and comes bundled with all the necessary mounting plates, thermal compound and a well detailed user manual for seamless installation.            

Zalman FX100 Fanless CPU Cooler Specifications
CPU Socket Supported Intel Socket LGA 2011/1366/1150/1155/1156/775, AMD Socket FM2/FM1/AM3+/AM3/AM2+/AM2
Heat Pipes Yes, 10 Heat Pipes
Cooler Width 156mm
Cooler Height 157mm
CPU TDP Support 95W

Buy Zalman FX100 Fanless CPU Cooler

Final Words

Passive CPU Coolers does help you to build a silent PC for users who prefer quiet environment. But they can be difficult to find and occupy chuck of space in your case. Also, they can be pretty hard to install because their big size does pose interference or clearance issues with other components and PC case. But if you can handle these issues then you will be rewarded with a complete silent operation from these fanless CPU coolers. For any doubts and suggestions, please leave a comment below.

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